Redknapp shook up his midfield after going into the break 2-0 down and also brought on Jermain Defoe.
Wenger told arsenal.com: “Maybe. I felt that they were more open in the second half and we had more room to play and to create chances, but I felt for example that Chamakh in the second half was clean through and came back because he had no legs. He played 70 or 80 minutes on Wednesday night.
"Of course after they come back and they are dead. But we had the opportunities, even in the second half to kill this game off."
Asked if three home defeats is too many at this stage of the season, Wenger conceded: “Yes I agree. Three home defeats are three too many. The first two games we didn’t deliver the performance and we can only say that we got what we deserved.
"Today we delivered the performance, but what is worrying for me is that we had an opportunity to go to the top of the league and when we have to deliver we can’t. That’s worrying because that’s part of our job.”