"We lack a little bit of oil in our engine in the final third," Wenger said. "What looks completely natural when you are at your best is still not there and we have to work on that.
"[We can get that working] by practicing how we want to move and on the quality of the final ball. Today we had Giroud, Podolski and Cazorla together up front.
"One month ago they didn't know each other. It is the department where we have the most new players and you could see that."