FULL TIME. All square here at Camp Nou to leave the tie finely balanced ahead of next week's return. Thanks for your views tonight, stay with us for reaction.
Diego wins a free-kick 35 yards out on the left.
Xavi puts the free-kick into the box but Tiago heads away.
Sosa fouls Neymar for a Barca free-kick 16 yards out to the left of the Atletico box. He is booked.
Three added minutes are announced.
Messi takes the corner but Godin heads clear.
Alves wins a corner on the right after Sanchez is tackled in the box.
Neymar wins a free-kick off Juanfran six yards out on the left. Messi drills the free-kick across the box but Luis clears and is fouled as he does so for a free-kick to Atletico.
Barca continue to press but Alves cross from the right is cleared by Miranda.
Messi takes the free-kick but Godin clears the box.
Messi hits the free-kick at goal and Courtois manages to push the ball around the post for a corner on the right.
Sanchez wins a free-kick off Koko 22 yards to the right of goal.
Barca come again but Luis intercepts Alves' cross from the right.
Xavi swings in the free-kick into the box and wins a corner on the right. They take but Courtois gathers the ball.
Rodriguez is booked for a foul on Neymar. It is a Barca free-kick 28 yards out on the left.
Barca take the free-kick. They keep possession before Courtois clears the box.
Busquets wins a free-kick off Diego 28 yards out on the left. Diego is booked.
Neymar wins a throw in 20 yards out on the left. He takes and Barca keep possession before Tiago heads Iniesta's cross the left away.
Rodriguez is on for Turan for Atletico.
Barca win a free-kick 35 yards out on the left. They take and keep possession before Xavi's pass is intercepted by Godin and cleared.
Barca take the corner and lay siege to the Atletico box but Luis finally scrambles the ball away.
Iniesta's shot is put out by Courtois for a corner on the right. Barca take and Messi wins a corner on the left.
Barca take the corner and Miranda partially clears before Sanchez crosses from the right but it is partially cleared.
Neymar tries an effort from ten yards on the left and it is deflected out by Juanfran for a corner on the left.
GOAL - NEYMAR!!!! Iniesta plays a great through ball pass from the centre to find Neymar to the left side of the box and he slots home from ten yards!!! Game on!!!
Sosa is on for Villa for Atletico.
Messi takes the free-kick but Godin heads out for a throw in 12 yards out on the right. Barca take but Luis wins a throw in further up field.
Atletico take the free-kick but Barca win the ball and Neymar goes down under a challenge off Gabi for a free-kick 14 yards out to the left of the Atletico box.
Sanchez is on for Fabregas for Barca.
Koke wins a free-kick midway in his own half after pressure from Barca.
Alves shoots at goal from the right edge of the box but it hits Messi in the centre and goes out.
Barca take the corner but Miranda clears.
Busquets volleys at goal from 25 yards in the centre but Courtois dives to his left and pushes the ball out for a corner on the left.
Iniesta goes down under a challenge of Juanfran in the box but the ref waves play on. Replays show he dived.
Iniesta tries to get to the left byline but Godin shepherds it out for a goal kick.
Barca press and Alves plays a one-two before crossing from the right to Fabregas in the centre who heads at goal and Courtois saves but the ref blows for a foul on Luis in the build-up.
Alba is booked for his reaction after losing the ball to Juanfran to the left of the Atletico box.
GOAL - DIEGO!!! Atletico take the free-kick short to Diego who hits a rocket from 28 yards on the right into the top corner on the net. Pinto had no chance!!
Iniesta catches Diego and is booked. It is an Atletico free-kick just inside the Barca half on the right.
Alves crosses from 25 yards on the right into the box but it is over hit and out for a goal kick.
Iniesta finds Neymar in the box who tries to lay the ball back but Turan intercepts and clears.
Barca break up field and Fabregas runs at the box after being released by Iniesta who is fouled by Juanfran but Godin tracks back and tackles Fabregas. Juanfran is then booked for the earlier foul.
Atletico take the free-kick but Miranda is given offside.
Neymar is dis-possessed by Diego on the halfway line. Atletico press and Diego wins a free-kick 25 yards out on the right touchline off Alves.
Baca continue to enjoy possession and this time Neymar creates a yard of space for himself before shooting at goal from 20 yards on the right but it is way over.
Barca come again and Neymar tries to get into the left side of the box but Tiago is there to tackle.
Fabrega crosses from the left into the box but Godin is there to head away.
Barca re-start the game. No changes at the break.
Chris has been back in touch to ask: Who do you think will triumph in the La Liga title race this season? Personally I'd say Real because I really rate Ancelotti and Barca and Atletico still have to play each other. Any other views?
Fancy a bet? Sky Bet now go 8/11 for a Barca win, 7/4 for the draw and 6/1 for an Atletico victory. My 3-1 Barca prediction is now available at 33/1! What are your views / predictions for the second period? Send them to email@example.com
HALF TIME. The sides go in all square at Camp Nou, although both had chances. Stay with us for the second period.
Neymar hands the ball on the halfway line as Barca break forward. Atletico take the free-kick quickly over the top and find Villa in the box. He takes a touch before shooting at goal from 15 yards on the left but Pinto saves well to his left.
Villa creates a yard of space and tries an effort from just outside the box on the left but it is blocked.
Four minutes of added time are announced.
Barca take the free-kick and win a throw in 30 yards out on the right. They take and eventually Neymar tries an effort from 22 yards on the right but it is just over.
Turan fouls Messi for a Barca free-kick just inside their own half on the left.
Barca lose the ball trying to play out of their box. First Koke has a shot which is blocked from 15 yards on the left before Alba wins the ball off Turan on the right.
Barca break forward and Iniesta floats a cross from the right into the box but Atletico scramble the ball away.
Barca press and Alves crosses from the right to Messi in the box and he heads on target from 15 yards in the centre but Courtois saves to his left.
Barca break quickly up field and try to feed the ball to Neymar to the left side of the box but Godin is quickly across to tackle.
Diego tries to release Villa with a pass from the left but it is over hit and out for a goal kick.
Xavi hits the free-kick sideways to Alba who volleys at goal from the left but it is well wide.
Neymar runs at the Atletico box and is felled by Gabi who is booked. It is a free-kick 28 yards out on the right.
Xavi puts the free-kick into the box and Bartra heads wide from 15 yards with a glancing effort under pressure.
Iniesta is fouled by Turan for a free-kick 30 yards out in the centre.
Barca come again and Iniesta tries to play a one-two with Messi to the left of the box but the return is intercepted and cleared.
Turan catches Alba for a Barca free-kick just inside the Atletico half. They take and feed the ball into the box but Courtois clears.
Iniesta gets to the left edge of the box and passes into the centre but Gabi intercepts and clears.
Koke tries to play a one-two with Diego but Bartra tracks back and intercepts the ball on the left edge of the box and clears.
Diego is coming on for Costa. One change for each side now.
Costa is limping after going for a ball with Busquets and it looks like he will have to be replaced.
Iniesta gets into the box on the left but Miranda tackles and clears.
Messi shrugs off Miranda before playing a pass from 25 yards on the left to Iniesta in the box. He tries a shot from ten yards but Godin gets across to block and clear.
Messi finds Alves on the right who crosses across the box from ten yards but he hits it too hard and it misses everyone in the box and goes out for a throw in on the far side.
Xavi passes into the box and Neymar heads at goal from 15 yards in the centre but it is straight at Courtois who gathers.
Costa tries to run towards the Barca box but Bartra tackles 35 yards out and clears.
The teams are cancelling each other out in the middle at present.
Barca take the free-kick and keep possession before Alves' pass is intercepted and Atletico clear.
Neymar is felled by Koke for a Barca free-kick 35 yards out on the right. He is booked for the challenge.
Alves tries to get down the right flank but the ball runs out for an Atletico throw in near their own box.
Iniesta is fouled by Tiago for a Barca free-kick on the halfway line. They take and keep good possession before Messi's pass towards Alba to the left of the box goes just behind him and out for a goal kick.
Gabi is fouled by Neymar for an Atletico free-kick just inside the Barca half. They take eventually feed the ball to Costa on the edge of the box but he shoots well wide.
Atletico take the corner but Busquets heads away from the box.
Turan crosses from 20 yards on the right and it is deflected out for a corner on the right.
Alves tries to release Neymar into the box with a through ball from the right but it runs through to Courtois to gather.
Pique hobbles off to applause from the home support with Bartra on. A blow for Barca.
Pique goes down again - he has not been able to shrug off his injury and he is going to be replaced by Bartra.
Barca take the corner short and Xavi crosses into the box from the left but it is too high for Neymar and goes out for a goal kick.
Messi wins a free-kick near the halfway line on the right. Barca take it quickly and feed the ball to Fabregas on the left whose effort from 30 yards on the left takes a deflection off Gabi for a corner on the left.
Pique goes down injured landing heavily after going for a header but looks okay to continue.
Barca come again and Neymar goes down under a challenge of Luis 25 yards out on the right but no free-kick is awarded.
Messi takes the free-kick but it is straight at the wall and Atletico clear.
Barca break up field and Messi is felled by Gabi for a free-kick 25 yards out in front of goal.
Pinto's clearance goes straight to Turan who passes to the unmarked Villa in the box. He turns and shoots from 12 yards in the centre but his effort is wide of the post.
Barca take the free-kick and keep good possession before Xavi tries to thread the ball into the box from the left but it is over hit and goes out for a goal kick.
Alves is fouled by Koke for a Barca free-kick just inside the Atletico half on the right.
Atletico come again, this time down the left and Villa shoots just wide from 20 yards out.
Atletico press with Turan getting down the right flank but just over runs the ball for a Barca throw in near their byline.
Atletico get the game underway.
The teams are coming out onto the pitch - not long to go now!
Adam says: "Both teams have quality in abundance. As my team Manchester City were dumped out of the cup by Barca in the last round, I hope Athletico do a number on them and win over two legs. As for tonight, I can see it ending stalemate 1-1 with Messi and Villa scoring on his return to Camp Nou." Very true Adam, one of my colleagues always bet on a player like Villa hitting his old team as first goalscorer and used to collect quite regularly. Enjoy the match!
MY VIEW - I think Barcelona will be too strong at home, and I'm hoping for plenty of goals, so 3-1 to the Catalans, which pays a handsome 12/1 with Sky Bet! What are your views / predictions? Send them to firstname.lastname@example.org
One of our regulars, Chris Green from Huddersfield, has been in touch with his prediction. Chris says: "Barcelona to win 2-1, with Fabregas and Messi scoring the goals." Cheers Chris,Barcelona will definitely be targeting a home advantage, but can they get the win? Anyone else with an opinion? Send your views / predictions to email@example.com
FIRST VIEW - Kevin has been in touch to say: "I think if Atletico can keep a clean sheet - as they are fully capable of - then the tie might be all theirs. An away goal however is a must! If they win this tie then I fancy them very much for La Liga also. ¡Viva Atleti!" Cheers Kevin, your chances of the away goal have been boosted with the inclusion of Diego Costa, enjoy the game!
Teams - There are three changes for Atletico. In come Tiago, Arda Turan and David Villa. Out go Mario Suarez, Jose Sosa and Raul Garcia, who is suspended. There was a worry about Diego Costa but he starts.
Teams - Just one change for Barcelona from the win over Espanyol at the weekend. In comes Iniesta for Pedro.
Fancy a bet? Sky Bet go 4/7 for a Barcelona win, 16/5 for the draw and 5/1 for Atletico to cause an upset and claim the win. What are your views / predictions ahead of this all Spanish clash? Send them to firstname.lastname@example.org
Teams - Atletico Madrid (4-4-2): Thibaut Courtois; Juanfran, Diego Godin, Miranda, Filipe Luis; Koke, Gabi (capt), Tiago, Arda Turan; David Villa, Diego Costa. Subs: Aranzubia, Mario suarez, Rodriguez, Alderweireld, Insua, sosa, Diego Ribas.
The teams are in. Barcelona go 4-3-3: Jose Manuel Pinto; Dani Alves, Gerard Pique, Javier Mascherano, Jordi Alba; Sergio Busquets, Xavi (capt), Cesc Fabregas; Neymar, Lionel Messi, Andres Iniesta. Subs: Oier, Pedro, Alexis, Bartra, Song, Adriano, Sergi Roberto.
Welcome to the Camp Nou where Barcelona host Atletico Madrid in the first leg of their Champions League quarter-final tie. What do you think the outcome will be tonight? Send your views / predictions to email@example.com and I will post up the best throughout the evening.