Danny Welbeck scored the only goal as we extended our winning run to 11 games in all competitions and took command of Group E in the process.
We came into this match knowing that a win would put us in pole position to seal top spot early, and Unai Emery named a strong side here in Lisbon.
But perhaps owing to the early kick-off time, the atmosphere inside the ground at the start of this game was somewhat muted – and that translated to the action on the pitch.
Neither side were able to take control during a low-key first half, with Nani going closest for the hosts with a curling strike from the edge of the area, while Pierre-Emerick Aubameyang and Granit Xhaka had our most notable efforts at goal.