Manchester United's recent defeats to Everton and Newcastle United have shown that the Premier League champions are short of at least two midfielders who are capable of playing at the top.
United look particularly shaky when Red Devils midfielder Michael Carrick is unable for selection.
David Moyes' other central midfield options have failed to impress the Old Trafford chief so far this season.
Marouane Fellaini has failed to settle into life at Old Trafford, Ryan Giggs has just celebrated his 40th birthday, Anderson continues to underachieve and Tom Cleverley does not have the quality to play for a side chasing trophies.
United are in desperate need for someone who can screen the back four, win back possession before passing it to a teammate who can cause damage to the opposition.
Arsenal and Manchester City have recently been linked with a move for Lassana Diarra, as they are also looking to bolster their midfield options.
However Manchester United need the former Portsmouth, Chelsea and Arsenal holding midfielder a lot more than the aforementioned Premier League duo.
The Lokomotiv Moscow midfielder is said to be happy with life in Russia - but he would surely be willing to seal a move back to the Premier League if a side like Manchester United came in for him.
A move to the Premier League could ignite his chances of playing for France in next summer's World Cup.
The former Real Madrid midfielder, who has been capped 28 times by France, has not represented Les Bleus since 2010.
Diarra does not score a lot of goals, but he is fantastic at protecting the back four.
Manchester United have conceded 19 goals already this season, which is the same amount as Hull and Premier League strugglers West Ham United.
Moyes has already declared he will not be spending a vast amount of cash in January - but Diarra may just be the perfect man to solve his side's midfield problems for a fee in the region of £10-15 million.
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