Arsenal striker Joel Campbell is expected to stay on the sidelines for six months after having surgery on his right knee.
The Costa Rica international was on international duty when he picked up the knock to his knee against Canada.
"We will see what the doctors say, but it is a pretty big tear and I will have to undergo an operation," he said after the injury.
He enjoyed loan spells to Lorient, Real Betis, Olympiakos, Villarreal and Sporting CP in recent season.
Recent reports have claimed that manager Arsene Wenger has decided to sell him during the summer transfer window.
But this will not be possible and the Gunners will be hoping to loan him out during the winter transfer window at the end of the year.
"Leaving the national team is sad and hard to do," the striker added.
"It is complicated when you get injured like this, it keeps you out of competitions and from representing your country.
