Jannik Sinner of Italy returns the ball during the men's single final match between Jannik Sinner of Italy and Alexander Zverev of Germany at ATP Tour Erste Bank Open in Vienna, Austria, Oct. 26, 2025. (Xinhua/He Canling)

Jannik Sinner of Italy serves during the men's single final match between Jannik Sinner of Italy and Alexander Zverev of Germany at ATP Tour Erste Bank Open in Vienna, Austria, Oct. 26, 2025. (Xinhua/He Canling)

Alexander Zverev of Germany returns the ball during the men's single final match between Jannik Sinner of Italy and Alexander Zverev of Germany at ATP Tour Erste Bank Open in Vienna, Austria, Oct. 26, 2025. (Xinhua/He Canling)

Jannik Sinner of Italy celebrates the victory after the men's single final match between Jannik Sinner of Italy and Alexander Zverev of Germany at ATP Tour Erste Bank Open in Vienna, Austria, Oct. 26, 2025. (Xinhua/He Canling)

Winner Jannik Sinner of Italy celebrates during the awarding ceremony after the men's single final match between Jannik Sinner of Italy and Alexander Zverev of Germany at ATP Tour Erste Bank Open in Vienna, Austria, Oct. 26, 2025. (Xinhua/He Canling)

Alexander Zverev of Germany returns the ball during the men's single final match between Jannik Sinner of Italy and Alexander Zverev of Germany at ATP Tour Erste Bank Open in Vienna, Austria, Oct. 26, 2025. (Xinhua/He Canling)

Alexander Zverev of Germany returns the ball during the men's single final match between Jannik Sinner of Italy and Alexander Zverev of Germany at ATP Tour Erste Bank Open in Vienna, Austria, Oct. 26, 2025. (Xinhua/He Canling)