Cricket South Africa will consider reviewing aspects of the 2015-16 domestic T20 match-fixing saga if evidence emerges that any of the seven players who admitted guilt were coerced or that the investigating process was compromised. CSA indicated its willingness to relook at the probe less than 24 hours after it defended the integrity of the investigation, following one of the players - Thami Tsolekile - claiming that there was racial discrimination in the investigation and that he was under duress when he accepted his ban.

"If there is credible evidence that players who signed admission of guilt documents did so under duress or coercion, without full due process, or if the process was compromised in any way, CSA will ensure that the relevant bodies give these issues appropriate attention, and will review the cases as appropriate," a board statement said.

Tsolekile, who is serving a 12-year ban for his role in fixing matches during the 2015 Ram Slam competition, spoke on Marawa Sport Worldwide and named two other players - Vaughn van Jaarsveld and Robbie Frylinck - as also being involved in match-fixing, who had gone unpunished. Van Jaarsveld and Frylinck are both white.

Yesterday, CSA revealed that van Jaarsveld was one of two whistleblowers, while no evidence was found to tie Frylinck to wrongdoing. Judge Bernard Ngoepe, who chaired the investigation, strongly denied any racial bias.

Since then, former Test opener Alviro Petersen, who was banned for two years, tweeted that he had given CSA an ultimatum to respond to him by 10am on Saturday or he would go public with evidence of bias in the match-fixing investigation.

Petersen subsequently posted that CSA heavyweights had been in touch with him. CSA has been contacted for comment but has, in the meanwhile, issued a statement indicating that all allegations of improper process are being taken seriously.

Firdose Moonda is ESPNcricinfo's South Africa correspondent