The Gunners started their Champions League campaign in fine fashion yesterday with a convincing 4-0 win over PSV Eindhoven.

Leandro Trossard was the pick of the players with a goal and an assist, and the Belgian is expected to retain his spot on the left wing.

Martinelli has been the regular in the role over the last 20 months, but he is facing a race against time to be fit for the derby at home.

Mikel Arteta will provide an update on his condition in tomorrow's press conference. It is most likely that he will be ruled out.

Even if he is available, Trossard is expected to continue on the left flank on the back of his impressive run of form for club and country.

Trossard recently scored a stunner on international duty before his match winner against Everton . He continued to impress vs PSV.

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