Australian Olympic Committee president John Coates says his organisation will fight what he calls an unreasonable proposal to hold some of the swimming finals at the 2016 Rio Games late at night.
American TV networks want the final sessions to begin at 10:00pm local time, meaning some gold medals would be decided after midnight.
Coates said discussions were underway to change the draft schedule to protect the athletes.
“It’s a matter that the AOC will now take up with the international swimming body FINA and with the International Olympic Committee,” he told reporters.
“It’s just an unreasonable demand on the athletes to be competing at that time of night.”