Welbeck wrong to try to score penalty, says Wenger

Arsenal manager Arsene Wenger says Danny Welbeck should have given Sydney FC the ball back rather than try to score a penalty in their pre-season match at ANZ Stadium.

The Gunners won 2-0 against the A-League champions, Per Mertesacker's early strike and a late goal from debutant Alexandre Lacazette proving decisive.

In between the two goals, Arsenal were awarded a controversial second-half penalty when Sebastian Ryall threw himself in the way to block with his back, only for the referee to point to the spot for handball.

"We made a mistake, we should have given them the ball back," Wenger told reporters after the match.

"It's always difficult to know how to behave. I think we should have just rolled the ball back because, I don't know if Danny Welbeck saw it on video, but on video it was obvious it was not a penalty.

"I haven't spoken to him yet. I think Per went to tell him to give the ball back. I don't know what happened."