Arsenal were made to work hard for their 2–0 victory over Athletic Club on Tuesday, with efforts from substitutes Gabriel Martinelli and Leandro Trossard ensuring a winning start to their Champions League campaign.
Last season’s European semifinalists cancelled one another out during an uninspiring first half, with Viktor Gyökeres producing the only shot on target of an evenly-contested affair in Bilbao.
But two moments of quality decided the tie in the second half, with Arsenal forwards Martinelli and Trossard etching their name on the scoresheet from the bench to get the Gunners over the line.
Here are three takeaways from a competitive encounter at San Mamés.
