Gabriel Martinelli and Leandro Trossard came off the bench to score as Arsenal beat Spanish side Athletic Club to get their Champions League campaign off to a 2-0 winning start.
Martinelli scored just 36 seconds after being introduced, with Belgium forward Trossard putting him through on goal in the 71st minute.
The Brazil winger then returned the favour, beating his man and giving the ball to Trossard to squeeze in the second in the 86th minute.
The home side had Arsenal pinned back for the opening period of the game.
