Manchester City face a difficult night in Italy against Napoli.
A team like that, playing at home with the goalscorers that they have, are clearly dangerous. And Napoli will play double or quits on this game - they have to win.
I saw Napoli play at Manchester City and they made a real impression in their organisation and their use of counter-attacks.
They play like an Italian team inasmuch as they only attack three times per half, but when they are in and around the box they are remarkably efficient and they always finish well. They are very intelligent.
I think they can achieve something good with the whole city of Naples behind them. They're like Marseille in that respect.
I'm not surprised that Sergio Agüero has adapted so quickly to the English game.
Actually, he is made for English game, he relishes physical battles, he uses his body perfectly and he is intelligent and cunning like many South Americans.
Bayern Munich are on the brink of going through from that group, so they won't have any more big European matches until the end of February when they will have Bastian Schweinsteiger back - that will make them very hard to beat.
Bayern are not a team you want to play if you qualify for the last 16.
What's more the final is in Munich so they will be at home if they get there and that will increase their motivation.
See what else Wenger has to say about the Champions League in his Matchday 5 preview: