Alexandre Lacazette has sustained an injury that will sideline him for at least six weeks.
The 26-year-old picked up the injury after coming off the bench in the second half of Arsenal’s 0-1 defeat to Tottenham on Saturday at Wembley.
Alexandre Lacazette was operated upon on Tuesday and it was described as ‘a success’.
"He will now undergo a period of rehabilitation," Arsenal added in a statement. "It is envisaged he will return within four to six weeks."
It leaves the Gunners with Danny Welbeck as the only recognised senior striker for Thursday's Europa League last-32 tie with Ostersunds FK.
New signing Pierre-Emerick Aubameyang is not eligible to play in the competition