He was brought to Palace by Frank de Boer last summer and became a fixture at the back defence, featuring 21 times in the Premier League.
The 20-year-old’s chances of minutes were in question when De Boer was sacked following a disastrous start to the campaign and Roy Hodgson was announced as the replacement, but he has thrived under the ex-England boss.
As part of a farewell message to Crystal Palace fans, Fosu-Mensah said: ”I’m not sure what’s coming up for me next season, but I want to compete at Manchester United and try to play. I just need to keep focusing on myself, try and become a better player and keep playing games.”
Fosu-Mensah has made 21 appearances at Man United since making his debut in the 2015-16 season and is considered to be one of the brightest prospects at the club, with many suggesting he could be a long-term replacement for Antonio Valencia at right-back.
Mourinho is trying to boost his defensive options during the transfer window – names such as Toby Alderweireld and Alex Sandro are being hotly linked – but Fosu-Mensah certainly has the attributes to play a positive part in the squad.
He can play in a range of positions from right-back, to centre-back, to centre-midfield and could prove to be a valuable asset if given the chance by his manager.