Robben was on the scoresheet in the 3-1 victory.
The former Chelsea winger revelled in his side's dominant performance, telling Sky Sports: "It was very good, the first 70 or 80 minutes in particular we played terrific football.
"To be so dominant against such a big team, we didn't expect an easy game like that.
"I think it's also a big compliment to our team but I expected a bit more from City."
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