Former Arsenal defender Martin Keown says Pierre-Emerick Aubameyang let the Gunners down during Thursday’s goalless draw against Sporting CP in the Europa League.
Aubameyang was named among the substitutes at the Emirates Stadium but was introduced after just 30 minutes following a serious injury suffered by Danny Welbeck.
The Gabon international subsequently missed a number of chances as the Gunners failed to break down their Portuguese opponents, though the draw was enough to secure their place in the knockout stages.
Former Gunners defender Keown singled out Aubameyang for criticism after the game and feels there is still much more to come from the 29-year-old.