Arsenal began their Champions League campaign with a 2-0 win away to Athletic Bilbao on Tuesday, with Gabriel Martinelli making an immediate impact from the bench to open the scoring and another substitute, Leandro Trossard, netting the second.
Martinelli replaced Eberechi Eze in the 71st minute, with Arsenal struggling to find a breakthrough despite creating plenty of chances, and the substitute netted an impressive solo goal after less than a minute on the pitch.
The Brazilian forward was sent racing through on goal after a flicked pass from Trossard, and the two combined again three minutes from time, with Martinelli's pullback from the byline finished off by Trossard.
Arsenal, who were beaten at the semi-final stage last season by eventual winners Paris St Germain, were the better side on the night, but laboured to put away an Athletic team backed by a boisterous San Mames stadium, until the substitutes arrived.
