For every Angel Gomes or Paul Pogba who makes a name for themselves after leaving Manchester United, there are countless examples of the other extreme too but this one takes the cake. Once a player plays for Manchester United, such is the visibility of the club that barring some extraordinary achievement, the tag of “ex-Man Utd player” follows them around always. It directly results in their performances being scrutinised far more than usual long after leaving the club. One ex-player, in particular, would have hoped that wasn’t the case after he marked his debut for his new club with an own go…