Elena Rybakina says she felt "destroyed" by the match scheduling at the Canadian Open and accused the WTA of "weak" leadership over the issue.
Rybakina's quarter-final win over Daria Kasatkina did not finish until 03:00 local time on Saturday, with her semi-final defeat to Liudmila Samsonova delayed to Sunday because of rain.
Samsonova then lost the final to Jessica Pegula about two hours later.
"I'm not really happy about it, but it is what it is," said Rybakina.
"I feel destroyed because of the scheduling and the whole situation.
"Unfortunately, players can't do much in these situations.