A decision on whether 47 Russian athletes and coaches can take part in the Winter Olympics may not be made until Friday – the day the Games start.
The Russians believe they have been wrongfully excluded from Pyeongchang by the International Olympic Committee.
They include the 28 athletes who had their life bans lifted by the Court of Arbitration for Sport (Cas) last week.
A Cas panel started hearing the appeals on Wednesday but they have been adjourned until Thursday.
“The panel’s decisions are expected to be announced either late in the evening of 8 February 2018 or in the morning of 9 February 2018,” Cas said.
The Winter Olympics run from 9 to 25 February in South Korea – although some events start on 8 February, the day before the opening ceremony.