England manager Fabio Capello has revealed that Rio Ferdinand has been sent for a scan after his captain suffered a knee injury during training.
The England players had been taking part in their first training session since arriving in South Africa when the incident took place at their Rustenburg training base.
Capello confirmed: "Rio picked up a knee problem in training. It happened near the end. He has gone to hospital for a scan and we will have to see how things are.
"He did it during a tackle. It was a normal tackle, but there was a slight problem. It was his left knee. We have to wait for the scan."
Ferdinand has endured an injury-plagued campaign with United, largely because of a troublesome back problem.
Capello also confirmed that veteran goalkeeper David James was unable to take part in the session although he was quick to play down the severity of the problem, adding: "David James has a little problem with his knee, but it is not a big problem."
In better news for England, Gareth Barry was able to take part in the session as he battles back from the injury he suffered last month playing for Manchester City against Tottenham.
Capello said: "Barry has started to train with the team and he has improved every day.
"He is getting better and better every moment and in the afternoon he will train in the gym with the physio. Every morning he will be with the team. We have to be careful because the ankle is still an issue."