Having required a last-gasp penalty to fortuitously secure victory against Southampton last weekend, the north Londoners rode their luck as they started their Champions League campaign with a draw at Paris St Germain.
Alexis Sanchez scored Tuesday's late leveller and again proved integral as Hull were comprehensively overcome 4-1 at the KCOM Stadium, netting a brace that was complemented by a Theo Walcott effort and Granit Xhaka's stunning stoppage-time strike.
It could have been a hat-trick had the Chilean not seen his penalty saved late in the first half, with the decision to send off Jake Livermore for deliberate handball playing a key part in City's inability to add to Robert Snodgrass' spot-kick which came after Petr Cech brought down Dieumerci Mbokani.
"I think overall we had a convincing performance in two different situations," Arsenal boss Wenger said.
"Eleven against 11, I thought we played well. When you play 11 against 10, it is of course not the same mentally and psychologically.
"But we remained serious and in the end we won the game in a convincing way, I would say, overall.
"But we had a very difficult game against Southampton last week, went away to Paris St Germain. We go away again so you are happy with the three points."