Arsenal redeemed themselves following the defeat to Lens in France last time out by beating Sevilla 2-1 in a cauldron-like atmosphere in Spain to return to the top of Group B.
On the stroke of half-time and with the score level, Arsenal deployed a scintillating end-to-end move which saw Gabriel Jesus spin his defender inside his own half before setting Gabriel Martinelli through on goal.
Martinelli, on his Champions League debut, drove into the box and held off pressure from four-time winner Sergio Ramos before rounding Orjan Nyland and slotting into an empty net.