The former Liverpool and Real Madrid winger believes that the reigning Premier League champions will have their work cut out against Pep Guardiola's record-breaking side
The reigning Premier League champions were paired with Pep Guardiola's side after overcoming Olympiakos, with the Bavarians firm favourites to advance against a United side enduring the most torrid of campaigns.
David Moyes's men squeezed past the Greek title-holders in the last 16 with a 3-2 aggregate victory but are sat seventh in the Premier League table following Tuesday's 3-0 defeat to Manchester City.
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"Can United beat Bayern? No, they have no chance," he told the press. "Bayern Munich have an amazing team - they're over 50 games unbeaten, which is an incredible record. They are the favourites for the Champions League."
The 42-year-old then gave his thoughts on the race for La Liga following Barcelona's 4-3 victory over Real Madrid at the Santiago Bernabeu on Sunday.
"The result of the Clasico is great news for La Liga because there are now three teams in with a chance of winning the title," McManaman enthused.
"When I see Diego Simeone with Atletico Madrid I see real possibilities, he is doing a perfect job."