Tierney is one of the greatest young products of Scottish football during recent years and has been touted with a move to a number of Premier League clubs, including United and Arsenal.
"But I just wonder if he can take the same confidence, bordering on arrogance - that whole 'I'm Mr Celtic' thing - into a dressing room with Paul Pogba, Romelu Lukaku, Alexis Sanchez and David de Gea. Are you going to take that in there?
"If he can, then his attitude will be contagious, it will spread throughout the team, just like it does with Scott Brown. If Kieran can be that guy then not only will the fans relate to him the way they do in Glasgow, but he'll be a hell of a player as well.
"He'll have an impact on the field, but also on the stadium and, when the crowd responds in that manner, performance levels go through the roof. If Kieran can do that for a big club there will be no stopping him."