Canada's Vasek Pospisil receives treatment from a trainer during his match against Sebastian Korda of the United States at the National Bank Open tennis tournament in Montreal, Wednesday, Aug. 7, 2024. (Graham Hughes/The Canadian Press via AP)

Canada's Denis Shapovalov returns a shot to USA's Brandon Nakashima during first round play at the National Bank Open tennis Wednesday, August 7, 2024 in Montreal. (Ryan Remiorz/The Canadian Press via AP)

United States' Ben Shelton, right, and Kazakhstan's Alexander Bublik embrace after their match at the National Bank Open tennis tournament, Wednesday, Aug. 7, 2024 in Montreal. (Ryan Remiorz/The Canadian Press via AP)

United States' Ben Shelton reacts after winning a game against Kazakhstan's Alexander Bublik during the first round of the National Bank Open tennis tournament, Wednesday, Aug. 7, 2024 in Montreal. (Ryan Remiorz/The Canadian Press via AP)

Flavio Cobolli of Italy salutes the crowd after winning his first round match against Felix Auger-Aliassime of Canada at the National Bank Open tennis tournament in Montreal, Wednesday, August 7, 2024. (Graham Hughes/The Canadian Press via AP)

USA's Brandon Nakashima returns a shot to Canada's Denis Shapovalov during first round play at the National Bank Open tennis, Wednesday, August 7, 2024 in Montreal. (Ryan Remiorz/The Canadian Press via AP)