The German giants impressed the United winger with their 12-1 aggregate win over Sporting Lisbon.
He said: “Bayern Munich are very strong.
“I watched them play against my old team, Sporting Lisbon, and I was very sad because I didn’t expect Sporting to lose so heavily.
“But this can happen in football. Bayern are very good – they have mature players, strong players, quick players.
“Franck Ribery and Miroslav Klose are very impressive. Bayern play like a team and they look very difficult to beat.”
