Signed after barely one season in the Porto first team, Diogo was brought in by Jose Mourinho as a summer signing in 2018.
Although injuries have interrupted his progress at Old Trafford, he remains a hugely gifted prospect who has already made 33 appearances for the club in two seasons.
Arguably his best moment to date came in January of the current campaign, when he scored United's second goal in a 6-0 drubbing of Tranmere Rovers in the Emirates FA Cup at Prenton Park. You can see that effort below, which is also our Goal of the Day today (Tuesday).