Former Manchester United defender Paul McGrath believes the PremierLeague champions should make a New Year's Day move for Juan Mata.
Mata has been in and out of Chelsea's starting line-up this season, as Blues boss Jose Mourinho has instead opted to play Oscar, Eden Hazard and either Willian or Andre Schurrle behind the main striker.
Reports suggest Mata is starting to become disillusioned with life at Stamford Bridge and could ask to leave the west London outfit in January.
French side Paris Saint-Germain are said to be preparing a bid in the region of £35million for the playmaker, however McGrath has urged Manchester United to make a move for the Spain international.
McGrath, speaking to the Sunday World, said on Mata: "On New Year’s Day, when the Premier League transfer window opens, Manchester United should stick in a big, big bid for Juan Mata.
"He’s just the player they need to kick on in the title race and it breaks my heart to say that my boyhood club Chelsea don’t seem to want the brilliant Spaniard.
"I cannot understand Jose Mourinho’s thinking on the matter. His treatment of Mata suggests to me that the magic is not working second time around, that he hasn’t got everyone pulling together on the way to what ought to be an easy Premier League title."
Mata, who was linked with Manchester United in the summer, could miss out on a place in Vicente del Bosque's Spain squad if he cannot hold down a regular spot in Mourinho's first team plans or leave Stamford Bridge in January.