It is believed that the injury which forced Valon Behrami off the pitch during Switzerland's 1-1 draw with Italy on Saturday will not prove to be serious.
Switzerland coach Ottmar Hitzfeld has played down concerns over the West Ham United midfielder's fitness after the 25-year-old suffered a suspected groin injury shortly before the hour-mark in Geneva.
Behrami, who was earning his 27th cap, went close to scoring midway through the first half, only to see his goalbound effort deflected over the crossbar by Gianluca Zambrotta.
Hitzfeld is hopeful that the Hammers player will be ready for action when the Swiss take on European champions Spain in their opening FIFA World Cup Group H fixture on 16 June.
"Behrami was playing very direct and looked threatening. I hope it's not serious," said the German-born manager. "He wanted to continue playing actually. It was the doctor who took him out."
Behrami will be desperate to be involved in South Africa after being restricted to just two minutes of action at Germany 2006 by a knee injury.
There was also encouraging news from the England camp in Bafokeng, with Matthew Upson set to return to full training on Monday after missing the last two days with a high temperature.
Fabio Capello's side take on the local Platinum Stars side on Monday, and the West Ham centre-back will hope to be involved at some stage, as will club-mate Robert Green.
A Football Association spokesman confirmed: "Matthew is feeling a lot better. He is working in the gym today and will train tomorrow [Monday]."
England begin their World Cup challenge by facing Jonathan Spector's United States in Rustenburg on Saturday.