Sanchez's sensational strike to seal Arsenal comeback
The Chilean striker scored one of the goals of the Europa League after finding the top corner with a curling strike away from the reach of Horn.
Cologne took the lead in the first half before Arsenal began their comeback in the second period. Kolasinac was the first to strike for Wenger's after powering a sweet volley past the keeper.
In the 66th minute, Alexis Sanchez picked up the ball on the left and cut inside before finishing into the top corner to seal Arsenal's comeback.