The trial of Lamine Diack, former head of athletics’ world governing body the IAAF, has been delayed until June.
The 86-year-old Senegalese faces corruption and money-laundering charges linked to the Russian doping scandal.
The trial was due to start in France on Monday.
But new documents were submitted to the Paris court concerning testimony that his son and co-defendant Papa Massata Diack gave in Senegal in November.
The BBC has learned the IAAF, now called World Athletics, is seeking 41.2m euros (£35.3m) in compensation from the six defendants as a result of the scandal.
The governing body has lodged a claim based on loss of sponsorship revenue, damage to reputation and potential loss of earnings.