'Red Devils' to activate De Gea clause

David de Gea, 28, joined Manchester United from Atletico Madrid in 2011 and has seemingly improved season after season, though his contract is set to expire in the summer.

With the Spaniard yet to agree a new deal with Jose Mourinho's side, clubs overseas would be allowed to talk to him from the beginning of January and potentially sign a pre-contract agreement. 

Yet, United have the unilateral option to extend the goalkeeper's contract for another year, which would ward off interest - for the time being - from some of Europe's biggest clubs, with PSG said to be preparing an offer.

De Gea is reportedly open to the idea of remaining at Old Trafford, though there has been no agreement as of yet, and De Gea's camp have noted the enormous salary that United used to tempt Alexis Sanchez away from Arsenal in January.