The corruption case against former president Jacob Zuma and French arms company Thales is back in the Pietermaritzburg high court.
Zuma wants want lead prosecutor Billy Downer off the case.
He is arguing that Downer lacks independence and impartiality.
The former president and French arms manufacturer Thales are on trial over the controversial multibillion-rand arms deal.
Zuma is on medical parole after serving two of his 15-month sentence for refusing to appear before the Zondo Commission.
