Roberto Martinez's future will not be decided until next week, but Dave Whelan still hopes to keep him at Wigan.
Manchester United defender Rio Ferdinand has signed a new one-year contract with the champions.
QPR have forked out a club-record fee to secure the signing of Anzhi defender Christopher Samba on a four-and-a-half year deal.
The former Blackburn centre-back was one of the west Londoners' key targets for transfer deadline day as Harry Redknapp looks to shore up his defence.
That deal is now complete, with Samba joining for an undisclosed club-record fee, subject to the player receiving international clearance.
The Congolese defender, who was with Blackburn until last February, will wear the number five shirt at Loftus Road and fills the void left by Ryan Nelsen after his decision to become Toronto FC head coach.
"This is an unbelievable signing," Redknapp told the club's official website.
"[Chairman] Tony Fernandes deserves a lot of credit for this one - he has worked so hard on bringing him in.
"I was speaking with him a month ago and he asked me who I would want to sign if Ryan Nelsen left, he asked me to give him a couple of names.
"I said to him 'Well, these aren't possible to get but if you're asking me who I'd have, I'll give you a couple of players'. One of them was Chris Samba.
"The next thing I know he's telling me that he's working on bringing him in! It's amazing. Chris is just what we need. He's a monster. Great in the air, quick, a leader, strong, fantastic in both boxes, hard as nails.
"He's a proper centre-half."
Christopher Samba factfile
1984: Born March 28 in Creteil, France.
1997: Starts his youth career at local French side D'Issy-les-Moulineaux where he plays for two years.
1999: Moves to FC Rouen in the third tier of French football where he stays for two more years.
2001: August -
Attracts interest from Sedan, where he signs a contract until 2004.
2003: August - Makes professional debut for Sedan after relegation to the second division, although he only goes on to make three league appearances.
2004: August - Attracts the interest of Hertha Berlin on international duty and after a brief trial, is signed.
2005: August - Makes debut for Hertha against Bayern Munich, losing 3-0.
2007: Spends three years playing for Hertha BSC, where he plays another 28 games, including eight appearances in the UEFA Cup.
2008: January 25 - Signs for Blackburn for £450,000, describing it as a "dream" to play in England. Goes on to make his Premier League debut six days later as a substitute in a 3-0 defeat against Chelsea.
October - After starting the season as a regular in the side, Samba signs new long-term contract to keep him at the club until the summer of 2012.
2009: Misses just three Premier League matches as he becomes a vital part of the Blackburn side, even appearing as a striker towards the end of the 2008-09 season, as they narrowly avoid relegation.
November - Signs a new five-year contract with Rovers, keeping him at the club until 2014.
2010: January - Makes 100th appearance in a Blackburn shirt, and scores his 10th goal for the club.
August - Appointed club captain for the 2010-11 season.
December 22 - Hands in transfer request in protest at the sacking of Sam Allardyce by new Rovers owners Venky's.
December 26 - Stripped of captaincy by new manager Steve Kean.
2011: February - Commits future to Blackburn by signing a four-and-a-half year deal, despite interest from Champions League teams. Regains captaincy.
May - Guides Rovers to safety, finishing 15th in the table.
2012: January 2 - Plays last game for Blackburn against Stoke.
January 17 - Submits another transfer request after Kean rejects a bid from QPR. Samba says he wants "a new challenge", after missing training and threatening to strike at the club.
February 24 - Joins Russian side Anzhi Makhachkala for a fee thought to be around £12.3million.
March - Victim of racist abuse as a banana is thrown onto the pitch during a game against Lokomotiv Moscow.
2013: January 30 - QPR have an offer accepted by Anzhi and Samba travels to London for a medical.
January 31 - Officially announced as a QPR player, signing a four-and-a-half-year contract.