BILBAO, Spain -- It took just 36 seconds for Gabriel Martinelli to justify Mikel Arteta's belief that Arsenal now possess the squad to win the UEFA Champions League . After 70 minutes of toil against Athletic Club in Spain, Martinelli's instant impact as a match-winning substitute proved that Arteta now has game-changers on and off the pitch.

Martinelli's goal, 36 seconds after replacing Eberechi Eze , came from a pass by Leandro Trossard , who had only entered the game himself six minutes earlier in place of Viktor Gyökeres . Fifteen minutes later, Martinelli then turned creator for Trossard to score Arsenal's second to cap a 2-0 victory against Ernesto Valverde's team in Bilbao and set the Gunners on their way to a winning start in the League Stage.

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