Jones, 33, was named in the starting XV by Warren Gatland for the warm-up against RBS 6 Nations champions England at Twickenham but withdrew with a calf injury just before kick-off.

Wales assistant coach Rob Howley expects the British and Irish Lion to start training soon but is doubtful that Jones will play any part against the World Champions.

“Steve has continued to do his rehab,” said Howley.

“He hasn't taken a full part in training as of yet, and hopefully he will take a full part probably tomorrow.

“At this moment, obviously there is a doubt. He hasn't played for a long period of time.

“We need to give Steve enough time to make sure he is right. We are giving him plenty of time.”

Howley is confident that Wales can build up momentum against the 2007 winners – who may be without injured lock Bakkies Botha – and hopes players draw on recent experiences against the Springboks.

“In a World Cup it is about winning and gaining momentum,” he said.

“All we are looking ahead at is the game on Sunday, which is so important to us.

“Some of our players have played against South Africa eight times over the last three or four years, including their Lions experiences in 2009.

“The players have learnt, and that is what Test match rugby is about.”