Switzerland coach Ottmar Hitzfeld is anxiously awaiting news from his medical staff on the condition of Alexander Frei after the captain limped out of the team's final training session in Zurich on Wednesday.

The striker remained on the ground after a tackle from Steve von Bergen and, after receiving treatment from the team doctor and physio, he was helped away from the field and may not be able to board the flight which takes Switzerland to South Africa on Wednesday night.

"I hope he has not torn any ligaments or fractured anything," said Ottmar Hitzfeld. "We have sent Alex to hospital to get a clear diagnosis."