Before the 2-0 win, Wenger admitted he took a close look at Aquilani while he was still with Roma.
"We were not interested in Aquilani last year, we were the year before," said the Frenchman.
"Last year he didn't play a lot and we didn't feel that this year we needed a player in this position because we have so many good young players in midfield. It's always difficult to convince people that we don't need players but when you see them play tonight you can understand why. We see them everyday in training and we have so much quality with our young players that we are not especially out on the market."