Banned athletics coach Alberto Salazar's appeal against his four-year suspension at the Court of Arbitration for Sport (CAS) has been postponed until March because of the coronavirus pandemic.
Hearings in the cases involving Salazar and doctor Jeffrey Brown, both of whom were banned following a six-year investigation conducted by the United States Anti-Doping Agency (USADA), had been due to run from Monday (November 8) to November 16.
The appeals will now be heard from March 3 to 12 owing to complications caused by the COVID-19 crisis.
The location of the hearings has not yet been confirmed, although sport's highest court said in June that they were likely to be held in the United States rather than Switzerland, where CAS is based.
Several CAS hearings have been postponed, while others have been held via video conference or a combination of virtually and in-person.
Salazar was banned for "orchestrating and facilitating prohibited doping conduct" as head coach of the Nike Oregon Project (NOP), a camp designed primarily to develop US endurance athletes and which was shut down in the wake of his ban.
USADA alleged Salazar trafficked banned performance-enhancing substance testosterone to multiple athletes.
Salazar was also said to have tampered, or attempted to tamper, with NOP athletes' doping control process, according to USADA.
He denies wrongdoing.
Brown, a paid consultant endocrinologist for NOP on performance enhancement and who served as a physician for numerous athletes in the training programme, was also banned for four years.
No athletes have been charged with any offences, although the World Anti-Doping Agency (WADA) has promised to investigate those coached by Salazar.
It came after the International Olympic Committee called on WADA to look into those associated with the 61-year-old American.
Britain's four-time Olympic gold medallist Sir Mo Farah and double world champion Sifan Hassan of The Netherlands are among those to have been coached by Salazar.
Neither has been charged with a doping offence and both deny any use of prohibited substances.