When Arsenal fans are asked to pick out the key moment from their win over Aston Villa on Saturday evening, it is likely that many will point to the decision Mikel Arteta made to replace Gabriel Martinelli with Leandro Trossard midway through the second-half. Gabriel Martinelli came in for some criticism for his performance against Wolves on the opening day of the season, but Mikel Arteta kept faith with the Brazilian for what, based on last year, was set to be a huge test for the Gunners. Martinelli saw plenty of the ball during the first-half at Villa Park. However, he was unable to really m…
