Chelsea transfer news: Thomas Muller, Cristiano Ronaldo, Diego Costa - the players linked in and out of Stamford Bridge in January

Chelsea are looking to reinforce during the January window

(2015 Getty Images)

Chelsea may be undefeated in their last three matches but they are still playing way below the level expected of them.

Just six months after being crowned Premier League champions, the Blues are recovering but still somewhat in the midst of a crisis, 15th in the Premier League, 12 points away from the top four.

With Diego Costa misfiring and seemingly clashing with Jose Mourinho, and several other stars under-performing, it seems certain that Chelsea will make a couple of moves in the January transfer window to improve their fortunes.

Here we take a look at the players that have been linked with the Blues in recent weeks - some rather more fanciful than others.

We also look at the players who are at risk of getting the chop by the Portuguese manager.

Scroll through the gallery to see the players:

Who should Chelsea buy and sell? Let us know in the comments section