"I'm not sure why. Maybe it's a bit of nerves or anxiety, because we show what we can do when we play. We will look at it and try to put it right."
But while Wenger ponders a redesign, Bayern will surely only grow stronger.
For next season they will have their own artist and in Pep Guardiola, the former Barceloan coach, it will have a man who has produced one of the great works of modern football.
In the night's other game, Joao Moutinho's second half strike was enough to give Porto a 1-0 win over Malaga.
In a tight and cagey contest, Moutinho popped up six minutes after the break to take Alex Sandro's pass in his stride and fire home past Willy Caballero.
But Malaga coach Manuel Pellegrini is adamant his side can still prevail when the two teams meet again in three weeks time.
"Whether it is a good result or not we will see at the end of 180 minutes," Pellegrini told Spanish TV station TVE.
"To lose is never good, but losing by just the one goal is the best thing we can take from the game.
"For all the possession Porto had they didn't create many clear cut chances and even the goal itself is offside.
"You have to give credit to Porto for the way they pressed us all over the pitch, but we have to apply the same pressure in Malaga.
"We can still turn the tie around at La Rosaleda. We have demonstrated this year that we can compete with anyone."