Alexis Sanchez scored a wonderful goal against Dortmund, enough to get Gunners teammate Mesut Ozil applauding.
Ozil is unavailable to play for the Gunners due to a knee injury, but took to Twitter almost immediately after the Chilean's goal struck the back of the net.
Sanchez's goal doubled the early strike from Yaya Sanogo, who had scored his first ever competitive effort for the Gunners after being brought in for the injured Danny Welbeck.
Olivier Giroud, despite being back from injury, was unavailable after Arsenal failed to register him for the Champions League group stages.
25-year-old Sanchez has now scored 13 goals in 21 games for Arsenal in all competitions, and that was his third in five Champions League games.
You can only wonder if it would have been more, or less, had he had Mesut Ozil assisting him over the last few weeks...