It was a tale of two substitutes on Tuesday night, as we secured a 2-0 opening-night victory in the Champions League against Athletic Club.
Gabriel Martinelli and Leandro Trossard laid on a goal apiece for one another after being introduced in the second half by Mikel Arteta at Estadio de San Mames.
Piero Hincapie and Christian Norgaard made their competitive bows late on in the Basque Country, rounding off a job well done on the continent.
Take a look at the best of our photographers' images, captured throughout the night, in our gallery below.