Manchester United are reportedly keeping a close eye on the progress of Villarreal and Nigerian winger Samuel Chukwueze.
The 21-year-old has bagged a combined 12 goals and assists in the previous two seasons and his performances have been closely tracked by several European clubs.
Chukwueze recently ended a 12-month goal drought by opening the scoring against Real Valladolid on Monday night. Villarreal eventually won the game by a 2-0 scoreline.
His contract currently has a release clause worth £80m, but it has been claimed in the past that the Yellow Submarines could sanction his sale for around half the price.