The Court of Arbitration for Sport has handled 11 appeals – predominantly from Russian athletes banned for doping – during the seven days it has been at a temporary base at the Rio Olympics.
It is the same number of appeals registered in the entire period of the London Games in 2012.
Appeals from 17 Russian rowers, as well as three Olympic medal-winning swimmers, have been adjourned.
The Russian weightlifting federation is also fighting a team ban.
Cas is an independent international institution that arbitrates on sport-related disputes.
Individual sport federations banned the competitors after the International Olympic Committee asked them to rule on which Russian athletes can take part.
The IOC asked the governing bodies to exclude anyone who has previously served a doping ban or implicated in a recent report into state-sponsored doping in Russia.