Nemanja Matic has told his club Benfica that he wishes to rejoin Chelsea in the January transfer window, according to the Metro.
The 26-year-old has been a revelation in the Portuguese league since joining in a deal that saw David Luiz move to Stamford Bridge in 2011.
With Manchester United struggling in the Premier League and Michael Carrick also failing to find form or fitness, it was reported that Moyes was plotting a move for the €30m-rated defensive midfielder.
But in what could be another massive transfer blow for the Old Trafford boss, Matic has told his club that he wants to join Jose Mourinho at Chelsea in the near future.
The Blues were thought to be lining up a £17m bid for the player they allowed to leave for free and will be boosted by the player's decision to return to west London.
With John Obi Mikel his only viable option for the anchorman role in midfield at the moment, Mourinho is keen to add steel to his midfield and strengthen Chelsea's Premier League title challenge.
Manchester United have also been linked with a £24m move for Ilkay Gundogan and may need to explore that option further after Matic's decision to reject interest from Old Trafford.