Despite sitting inside the Premier League's top four, the Red Devils' Champions League exit has left some calling for van Gaal's departure.
Celtic have failed to make it into the Champions League group stage in both the seasons Ronny Deila has taken charge of.
Toure is out of contract with the Reds in the summer and Jurgen Klopp could have another defender lined up.
With the return of Sol Bamba and an injury to Gaetano Berardi Leeds United could change things up.
The youngster had two excellent opportunities to win the game for the Blues at Deepdale.
The Newcastle midfielder's future is the subject of a question mark or two.
The Italian international has five goals in 10 games for Juventus this season.
Leeds head to Wolves this evening in the Championship.
West Brom boss Tony Pulis is looking to offload three outcast players in January.
Luton Town boss John Still has parted company with the League Two club.
Harry Redknapp has resigned as QPR manager - but who do the bookmakers believe will replace him in the Loftus Road hot seat?
Leeds failed to sign a winger in January, but two players could still help Neil Redfearn's men.
Match between West Ham United and Manchester United to be played on Sunday 8th February 2015 at 16:15. Venue: Boleyn Ground, London.