Valdes will go under the knife on Monday to repair the torn anterior cruciate ligament that has brought a premature end to his Barcelona career.
The 32-year-old goalkeeper, who has long planned to leave the Nou Camp at the end of his contract in June, fell awkwardly while saving a free-kick in the 22nd minute of Barcelona's 3-0 win over Celta Vigo on Wednesday night.
Valdes could be seen crying as he left the pitch on a cart and Barca later confirmed he had suffered an ACL tear in his right knee, which typically takes at least six months to heal. The injury has ruled the Spain international out of the World Cup and is certain to complicate his search for a new club.
"The surgeons that will conduct the operation are Ulrich Boenisch and Ricard Pruna. After the surgery, FC Barcelona will issue a medical report with the results of the operation."
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