Senderos lasted just 36 minutes of Wednesday's 1-0 victory over Spain before suffering the same ankle injury that ruled captain and star striker Alexander Frei out of their opener. While Switzerland welcome Frei back to training tomorrow, the Fulham defender's injury is more serious and he could even miss their last-16 match should Ottmar Hitzfeld's side progress.
"The doctor Cuno Wetzel has left the door open to a return for the defender for a potential last-16 match. But by indicating that his injury is more dangerous than that of Alex Frei, the doctor has ruled out practically any hope.
West Ham winger Valon Behrami is also sidelined with a thigh injury.