Theo Walcott could reportedly be fit to face Olympiakos this week, having sustained a knee injury in Arsenal's victory over Bolton on Saturday.
According to The Guardian, Arsenal have confirmed the 22-year-old's problem is only 'minor', which has allayed fears he could have been sidelined for a significant period of time.
Arsene Wenger had initially been 'very worried' about Walcott's prospects of a speedy recovery after the winger had pulled up late on in the weekend's encounter.
"I don't really know [what is wrong]. I thought it was a classic hamstring but it is not. He felt a sharp pain in his knee and at the moment he is with the doctor," said the Arsenal boss after the game.
"I don't know what the diagnosis will be but it is completely surprising. There was no one near him."
Walcott could now feature on Wednesday night at the Emirates Stadium, as the Gunners look to record their first win of the Champions League group stage.
The north London club opened their campaign with a draw away against Borussia Dortmund, having taken the lead against the Bundesliga champions.
Marseille are the other team to make up Group F, and Arsenal will face the French outfit on October 19.