Here’s how we reckon the Gunners will line up against the Welsh giant killers…
The Gunners will start with their normal defence against Cardiff, who nicked a draw against Premier League champions Manchester United last weekend.
In midfield, Mike Arteta should take the anchorman role, alongside Aaron Ramsey and Jack Wilshere, who were both brilliant against Marseille midweek in the Champions League.
In the attacking midfield positions, Theo Walcott could return, with Tomas Rosicky dropping to the bench. Mesut Ozil will play on the opposite flank, with Frenchman Olivier Giroud spearheading the side.