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Striker helps French Ligue 1 side beat promoted Ajaccio 2-1 in opener
According to club striker's comeback has been a priority for several months
Arsenal manager admits they may not be able to keep striker beyond his current contract
Striker scores in 96th minute to salvage 2-2 draw for Gunners against Crystal Palace in Premier League
It is the second misdemeanour in recent weeks for the Frenchmen
The Gunners finished the group stage with 11 points and a relatively easier draw in the knockout rounds
French striker is being checked by Gunner's medical team, but he does not think it is a serious problem
Pierre-Emerick Aubameyang and Alexandre Lacazette have both scored 50 times between them this season
The Gunners travel to Emery's old club Valencia on Thursday defending a 3-1 semi-final, first leg lead
41-year-old manager knows the tie is far from over due to the Gunner’s terrible away record this season