The Portuguese clearly believes the youngster has a future at Old Trafford, handing him a new four year deal back in October, but only handed him a total of four starts last season.
He moved to Palace on a season-long loan earlier this month, joining up with former Ajax boss Frank de Boer, and has been included in the starting XI for defeats to Huddersfield and Crystal Palace.
Reflecting on the last couple of weeks, the Dutchman – in spite of two galling results – was clearly enjoying his experience at Selhurst Park so far and noted he has kept in regular contact with Mourinho.
“He’s been texting but sometimes he rings,” he said.
“Sometimes it is the assistant too (Rui Faria). It’s definitely good to have that contact because I’m still under contract there.
“He’s (Jose) told me to just keep focusing on my game. We spoke and both came to the agreement that this is the best move for my development. He’s said that we should keep talking to each other.”
“If you don’t look at the results then it’s been a good first few weeks. I’ve been learning a lot. I’m fine playing wherever the manager wants me to. I’ve played centre back when I was younger, I know how to play in that role.
“It is important for me to get games now. I’m 19, almost 20. I need to keep playing and learn a lot, to keep improving.”
Fosu-Mensah has been thrown into a role he may not have expected: never at Old Trafford has he been asked to play as a right sided centre back in a back three, but this is what De Boer has demanded of him and, while others are clearly struggling with the new system, the 19-year-old has produced a couple of energetic, disciplined displays.
He turned heads with a superb last ditch tackle against Huddersfield and will, much to Mourinho’s satisfaction, receive plenty of chances to play this season.
Palace, at least to me, are strong candidates to go down. They only survived by the skin of their teeth last season and history dictates that foreign managers without much experience at the bottom who try to introduce a free-flowing style often struggle. But Fosu-Mensah, educated under the guise of Ajax’s ‘Total Football’ approach, should have more success than most adjusting to this new mould.