Arsenal boss Arsene Wenger has described Gervinho as "vital".

Gervinho made a big contribution for Arsenal's victory over Champions League opponents Borussia Dortmund last night.

"He is vital for us because Robin likes to go to the ball and Gervinho likes to go into the space so they always push defenders back. That gives us space in midfield to create for Robin. He was a bit less sharp tonight but overall I am very happy," Wenger told arsenal.com.