Alexander Zverev of Germany celebrates victory after the third round of the men’s singles match between Alexander Zverev of Germany and Matteo Arnaldi of Italy at the 2025 National Bank Open tennis tournament in Toronto, Canada, July 31, 2025. (Photo by Zou Zheng/Xinhua)

Matteo Arnaldi of Italy returns the ball during the third round of the men’s singles match between Alexander Zverev of Germany and Matteo Arnaldi of Italy at the 2025 National Bank Open tennis tournament in Toronto, Canada, July 31, 2025. (Photo by Zou Zheng/Xinhua)

Alexander Zverev of Germany returns the ball during the third round of the men’s singles match between Alexander Zverev of Germany and Matteo Arnaldi of Italy at the 2025 National Bank Open tennis tournament in Toronto, Canada, July 31, 2025. (Photo by Zou Zheng/Xinhua)

Matteo Arnaldi of Italy returns the ball during the third round of the men’s singles match between Alexander Zverev of Germany and Matteo Arnaldi of Italy at the 2025 National Bank Open tennis tournament in Toronto, Canada, July 31, 2025. (Photo by Zou Zheng/Xinhua)

Alexander Zverev of Germany returns the ball during the third round of the men’s singles match between Alexander Zverev of Germany and Matteo Arnaldi of Italy at the 2025 National Bank Open tennis tournament in Toronto, Canada, July 31, 2025. (Photo by Zou Zheng/Xinhua)

Alexander Zverev of Germany returns the ball during the third round of the men’s singles match between Alexander Zverev of Germany and Matteo Arnaldi of Italy at the 2025 National Bank Open tennis tournament in Toronto, Canada, July 31, 2025. (Photo by Zou Zheng/Xinhua)

Casper Ruud of Norway celebrates his victory after the third round of the men’s singles match between Nuno Borges of Portugal and Casper Ruud of Norway at the 2025 National Bank Open tennis tournament in Toronto, Canada, on July 31, 2025. (Photo by Zou Zheng/Xinhua)

Casper Ruud of Norway returns the ball during the third round of the men’s singles match between Nuno Borges of Portugal and Casper Ruud of Norway at the 2025 National Bank Open tennis tournament in Toronto, Canada, on July 31, 2025. (Photo by Zou Zheng/Xinhua)

Casper Ruud of Norway serves during the third round of the men’s singles match between Nuno Borges of Portugal and Casper Ruud of Norway at the 2025 National Bank Open tennis tournament in Toronto, Canada, on July 31, 2025. (Photo by Zou Zheng/Xinhua)

Nuno Borges of Portugal returns the ball during the third round of the men’s singles match between Nuno Borges of Portugal and Casper Ruud of Norway at the 2025 National Bank Open tennis tournament in Toronto, Canada, on July 31, 2025. (Photo by Zou Zheng/Xinhua)

Casper Ruud of Norway returns the ball during the third round of the men’s singles match between Nuno Borges of Portugal and Casper Ruud of Norway at the 2025 National Bank Open tennis tournament in Toronto, Canada, on July 31, 2025. (Photo by Zou Zheng/Xinhua)

Nuno Borges of Portugal returns the ball during the third round of the men’s singles match between Nuno Borges of Portugal and Casper Ruud of Norway at the 2025 National Bank Open tennis tournament in Toronto, Canada, on July 31, 2025. (Photo by Zou Zheng/Xinhua)

Casper Ruud of Norway returns the ball during the third round of the men’s singles match between Nuno Borges of Portugal and Casper Ruud of Norway at the 2025 National Bank Open tennis tournament in Toronto, Canada, on July 31, 2025. (Photo by Zou Zheng/Xinhua)