Former Manchester City midfielder Owen Hargreaves cannot see any weakness in Pep Guardiola's team.
City thrashed Sporting 5-0 in the first-leg of their Champions League round 16 tie last night.
Hargreaves insists no team would "get near them" the way they played in the first half, and admits he is stumped as to how they can be defeated.
"There is no such thing as perfection, but they're as close to a perfect team if there is one right now," Hargreaves said.
"When they're that clinical and efficient as they were in the first half, I don't think anyone can get near them.
"In the second half, if anything, they took their foot off the gas because they only had one shot on target.
"I don't know how you beat them, I'll be honest. Before we used to watch them and say 'they'll give you chances'. They don't give you chances anymore."
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