Jonty Rhodes could be ruled out of the World Cup after hurting his hand in South Africa's emphatic win over Kenya on Wednesday.
The 33-year-old broke a bone in his right hand, taking the shine off the World Cup hosts' 10-wicket victory at Potchefstroom.
"He was examined by physio Shane Jabaar and sent for x-rays which showed a
break," captain Shaun Pollock said afterwards.
"The doctors then sent him through to Johannesburg to see a specialist to find out the extent of the injury."
It is the second scare in the space of three days for Rhodes.
He went for an X-ray after aggravating an old injury to his right index finger while fielding against the West Indies in his team's opening match on Sunday.
The South African's hand was heavily strapped as a precaution when he took to the field on Wednesday.
But the new injury could mean Rhodes' fourth World Cup is cut short, which would be a major blow for the team.
"It is certainly a concern for us at this stage," Pollock added.
"We will wait for the news but perhaps we can look at a similar situation to Andre Joubert in the 1995 World Cup," added Pollock, referring to Joubert's broken hand in rugby union's premier tournament eight years ago.
The Springbok full-back spent time in a hyperbaric chamber to speed up the
recovery time of the injury.
Rhodes is one of the most experienced men in the South African squad and one of the best fielders in cricket.
He has made 245 one-day appearances and boasts a career record of almost 6,000 runs at an average of 35.31 with two centuries.
If Rhodes is forced to pull out, then South Africa could call up Graeme Smith, Neil McKenzie or rising star Jacques Rudolph.
Despite the injury blow, Pollock was delighted with the team performance, saying it was exactly what they needed after their opening loss on Sunday.
"After the loss on Sunday, there were certain points that we wanted to work on and we wanted to make sure we were clinical in our approach," he said.
"We bowled pretty well and were pretty good in all areas."