Arsenal boss Arsene Wenger is confident their firepower is strong enough.

They have not hit the target at the Emirates, where Arsenal have failed to score in five of their last six home games.

But an optimistic Wenger insists Olivier Giroud, Theo Walcott and last summer's star signing Alexis Sanchez could emulate former Gunners stars Nicolas Anelka and Thierry Henry.

He said: "Why not? I think Giroud, Walcott, Sanchez can get around 20 goals without any problem.

"Sometimes you have to trust your players and play them. Then they get there.

"People want always the absolute certainty that they will be absolutely successful. It is not like that.

"I played Anelka and people asked me 'why did you not buy anybody?'

"Thierry Henry the same. I said 'let him play, maybe he will score'.

"Football is a bit like that. It is not a science that everybody masters and where you can absolutely predict how many goals everybody will get. It is not true."