The Gunners also lost defender Laurent Koscielny to a hamstring injury in the second half which highlights Wenger's need to continually rotate his players.
When asked about the defender's injury, Wenger said: "It is a hamstring. This is why I rotate as we play many games.
"The other teams do it as well. You look at the other teams in Europe's benches and you will see them rotate.
"You cannot play every three days without rotating your players That is a fact and you have to accept that."