Arsenal midfielder Jack Wilshere will be out until the end of the year after undergoing an operation to his left fibula.
A statement on the club's official website revealed that the Englishman will be approximately out for three months.
The announcement comes days after manager Arsene Wenger was hoping for good news over the fitness level of the 23-year-old.
And the Frenchman was quick to reassure the fans over the midfielder's recovery.
"Like every player, he wants to play football and he is disappointed, but he has shown in the past he can deal with that," Wenger told reporters on Tuesday.
"I think he was determined to do it quickly and come back as quickly as possible.
"This kind of injury is not a kind of injury which can damage your career. It is just a bone that did not heal well. They need to put a little clip in. That is nothing major, not a career-threatening injury.
"I am not a bone specialist, so I would not like to give too many details. I have been explained the situation, but I leave that to the medical people. There is nothing malicious in there, just a part of his bone that has not healed.
"When you are injured and you come back, you always go through a vulnerable period, where you need to strengthen your body again, to gain competition," he said.
"I think he is young enough to get over that and I hope his body will stabilise, I am confident he will and that he can make a career his talent deserves."