Thanks for joining me this evening, please stay tuned for all the best post match reaction.
That's it, Chelsea book their place in the last eight and a date with Manchester United.
Cross from Bailey is cleared to the edge of the box, Williams meets it - but it is wide.
Three minutes of added time.
Corner comes in from Leadbitter, but Ivanovic clears. It comes back in and shot from Zemmama is wide.
Cech saves at the near post as Miller beats Betrand and gets his shot away.
Marin breaks into the area looking for a third, but good challenge from Hines.
88 Bailey brings down Ake and goes into the book.
Another good chance for the home side, it comes for Miller but he can only prod it over the bar. Should have hit the target.
Ferreira scrambles the ball behind as McDonald almost takes advantage of a mix-up. Leadbittter takes and Hines heads just wide. Close for the home side.
Another Boro free-kick, this time central about 25-yards out. Leadbitter and Zemmama over it. The latter takes, but Cech takes it with ease.
Still some fight in Boro and McDonald hits the side-netting from 25-yards, but it was always going wide.
80 Marko Marin on for Oscar.
Boro free-kick, Leadbitter takes but Luiz heads it out for a throw.
76 David Luiz replaces Moses.
Great run from Oscar and he flashes a shot just wide.
75 Zemmama replaces Carayol.
73 GOAL - VICTOR MOSES - Moses finishes off from good range after Hazard almost scores.
Ramies finds Hazard on the left, he cuts back on his right foot and curls a shot just wide of the post.
Friend breaks forward and tries one from 30-yards but Ivanovic blocks it.
Williams is brought down by Ramires, chance for Leadbitter to put a ball into the area - he does, but Branislav Ivanovic heads away.
Stray pass from McDonald sets Chelsea off on a swift counter attack, but Torres is handled well by Friend and he manages to bring the ball away.
62 Ishmael Miller replaces Main.
Moses takes corner, Terry gets his head to it but it is wide of target and Boro clear.
58 Eden Hazard is on for Benayoun.
Torres break the offside trap and is clean-through - he turns on the edge of the box and Steele tips it over.
Chelsea look for penalty as Ake goes down in the box - nothing given.
Boro corner, taken low by Bailey looking for McDonald - he meets it but the chance is charged down and Chelsea clear.
Straight from kick-off and Moses breaks into the box and fires a ball into the six-yard box but it again goes straight through.
51 GOAL - RAMIRES - Ball comes for the Brazilian on the edge of the box and his half-volley flys into top-corner. Took deflection off Torres, who may yet claim it.
Boro struggling to get out of their own half at the moment.
Chelsea enjoying the possession again early on in the second period.
Boro get the second-half underway - neither side has changed anything at the break.
Both teams are back out...
Again thanks for all the feedback tonight - some disgruntled Chelsea fans not happy with their display so far. Peter Hermes mailed in: "Just getting too painful to watch this Chelsea team tonight. How many more times can they pass the ball directly into touch? I was hoping that the performance at Brentford was going to be the low point of the season but hold on..."
Whistle goes and it is all square and goal less at the break.
Another Boro player down, this time Williams after being caught by Ramires.
Chelsea corner, as Friend tackles Moses. Oscar puts it in but whistle goes for handball from Terry.
Good work from Terry on the edge of the box as he stops Williams breaking into the area.
Boro working hard at the moment, but Chelsea look dangerous when they get it wide to Moses.
Game stopped as Leadbitter is down and getting treatment.
Really good try from Carayol this time as he cuts inside and unleashes from the edge of the box - it bounces in front of Cech who can only chest the ball - but luckily for him it drops for Terry to clear.
Good play by Main to feed Haroun down the right, he looks for first time cross for McDonald but can only hit is straight at Cech. Chelsea break and Moses puts dangerous ball into near post but McManus heads clear.
Carayol comes inside and tries one from long range but pulls it well wide.
36 Bikey is forced off injured and is replaced by Seb Hines.
Oscar tries again, but it is way too long and Terry has to scramble just to keep it in.
Chelsea corner as Leadbitter deflects Oscar's cross behind. Oscar takes it, Bailey heads clear but straight back to the Brazilian - he tries again but that is behind for another corner.
Boro look to break and Williams feeds Carayol, he comes into the box from the left but his touch is poor and Ramires clears.
Betrand attacks down the left, he looks to play one-two with Oscar but Bikey hacks it clear. Chelsea very much on top at the moment, dominating possession.
Torres feeds Benayoun in the box, the Israeli considers going for goal but he takes too long and Leadbitter is back to clear.
Good chance for home side as Bailey whips a ball into the box for McDonald who heads wide from 12-yards - he should have hit the target.
Nice football from the home side as Bailey finds Williams, he plays in Carayol down the left - he pulls it back into the box and Ramires has to hack it away.
Haroun brings it forward, he looks for Main - but he mistimes his run and ball runs through to Cech.
Finally a few Boro fans getting in touch, and they too are confident - Richyy Catterick þ@RichyyCatterick "@GraemeBailey boro to win 2-1 main to grab a brace #UTB"
Torres look to take on McManus - he looks for goal but it is a tame effort which is greeted by huge ironic cheers from the Boro fans.
Carayol, now on the right, whips a ball into the middle but it is comfortable for John Terry to clear.
Driving run from Williams and he goes down under Moses' challenge about 30-yards from goal on the left. Good ball in from Grant Leadbitter, but Chelsea manage to scramble it clear.
Torres gets wrong side of Stephen McManus, the Scottish defender falls but Friend and Andre Bikey are on hand to cover and clear.
Good work from Ramires to disposes Williams as he looks to break into the box after being found by Faris Haroun.
Scott McDonald is sent clear, but the flag goes up just as he looks to round Cech.
Good block from Williams as Victor Moses drove into the box and went for goal.
Still Chelsea fans dominating the feedback and they are confident, despite not liking the team. Dan Harvey "Not too confident with the team rafa's put out but im sure the lads will put in a good performance, i'm predicting a goal from torres and oscar each to make it 2-0"
Torres gets into the box and flashes a ball across the goal but again nobody can react for Chelsea.
Chelsea win first corner of the game, Oscar takes - but it is cleared at the near post.
Great chance for Chelsea as Oscar plays a ball into the six-yard box but neither Ramires or Yossi Benayoun can react - let off for Boro.
First meaningful action from Fernando Torres, he goes past Carayol but George Friend does well and puts it out for a throw.
Good run by Rhys Williams down the left and he is brought down by Ramies, chance for Boro to put this into the box. They do but Ryan Betrand clears.
First touch for debutant Nathan Ake in Chelsea midfield. Mustapha Carayol looks to play ball past Paulo Ferreira and latch onto it, but it is too strong.
First touch for Cech as he launches the ball up-field, Oscar enjoys a first run but he is stopped by some good defending from Nicky Bailey.
Chelsea gets us underway kicking from right to left.
Both teams are out, kick-off almost upon us.
Riverside is filling up, indications are that more than 26,000 will be here.
And on Twitter, Rohan Kalra þ@br0hank - "weak Chelsea team considering rafa wants to avoid a replay. Still 2-1 to Chelsea with Oscar and lampard from the bench scoring"
Thanks for your feedback so far, a lot of unhappy Chelsea fans with the team - like David Clark Sydney, Australia - who says: "Nice to see the Spanish Waiter is going for defeat with his team selection - hasn't he learnt anything about underestimating the opposition, especially in cup games?"
Middlesbrough team: Steele, Bailey, Friend, McManus, Bikey, Williams (C), Haroun, Leadbitter, McDonald, Main, Carayol. Subs: Leutwiler, Zemmama, Emnes, Ledesma, Hines, Miller, Smallwood.
Chelsea team: Cech, Ferreira, Ivanovic, Terry (c), Bertrand, Ramires, Ake, Moses, Oscar, Benayoun, Torres. Subs: Turnbull, Cole, Luiz, Lampard, Hazard, Marin, Ba.
Team news is coming in...John Terry returns to the Chelsea starting after manager Rafael Benitez had played down rumours of a training ground bust-up. Paulo Ferreira, Ryan Bertrand, Yossi Benayoun, Oscar, Victor Moses, Fernando Torres and, making his first senior start for the club, 18-year-old Nathan Ake also getting the nod. Boro boss Tony Mowbray is without the ineligible Josh McEachran and Kieron Dyer, replacing them and striker Marvin Emnes with Faris Haroun, Muzzy Carayol and Scott McDonald.
Whilst you wait why not join our friends at SkyBet for a little flutter. Middlesbrough are 9/2, the draw is 3/1 and Chelsea are 4/7. Click Here to bet.
I look forward to hearing from you and I will endeavour to post as many of your thoughts, opinions and reaction as I can.
If you would like to get in contact at any point this evening then please don't hesitate. You can mail me via the Score Centre, email me direct on firstname.lastname@example.org and you can also now Tweet me: @graemebailey.
Welcome to our live coverage of the FA Cup fifth round clash between Middlesbrough and holders Chelsea from the Riverside Stadium.