Vaughan was forced out by a virus from the latter stages of Thursday's thrilling tie in Bloemfontein.

He said: "I am not too bad. I didn't feel too good yesterday. But I hope to play, and it has got better."

England may elect to replace Kabir Ali with fit-again Steve Harmison, despite Ali's heroic final over in Bloemfontein.

Vaughan said: "It was a real gutsy performance from the young Kabir.

"To gather his thoughts and be mentally tough enough to produce those yorkers was a great effort.

"The more death-bowling options we have the better, and he is certainly one of those options."

South Africa will continue their policy of batting Herschelle Gibbs at number four at St George's, a ground which proved hard work for the batsmen during the 2003 World Cup.

It was the venue where England should have defeated Australia only for an incredible, unbroken ninth-wicket stand of 73 between Michael Bevan and Andy Bichel to overhaul a 205-run target in the final over.