The Academy graduate, who turned 19 last month, made his first league start at Everton in November and hasn’t looked back since.
Mainoo has gone on to play 20 Premier League games for United, scoring two goals, both of them spectacular efforts, against Wolves and Liverpool.
His impressive showings in Erik ten Hag’s midfield resulted in him winning the club’s Player of the Month prize in January and he was also picked in Gareth Southgate’s England squad for the latest set of international friendlies.
Kobbie was awarded his Three Lions debut against Brazil at Wembley and then started in the 2-2 draw with Belgium at the same stadium, three days later.