Two goals to skipper Cesc Fabregas, two more from young Mexican Carlos Vela and one each to Andrei Arshavin and Marouane Chamakh did the damage for the Gunners at the Emirates but Wenger was erring on the side of caution when complimenting his side.
"It is the start of the season. Let's take encouragement from what we've done at the moment," he said.
"We have to keep our feet on the ground, have humility and continue to work hard.
"We have another big test now at Sunderland on Saturday."