McTominay made 255 appearances for United, but struggled to nail down a regular role and position. Robertson added on Napoli’s talismanic attacking midfielder: "At Manchester United he probably lacked getting that run of games consistently, he was in and out and things like that.
"He probably didn’t get the respect he deserves. Then he goes over there, puts in a magnificent season and fair play to him to end it with the league title. Even before he was at Napoli, his standards for Scotland were unbelievable. He’s getting better and better, he has taken it to a whole new level."