SHANGHAI, CHINA - OCTOBER 07: Aleksandar Kovacevic of the United States serves in the Men's Singles First Round match against Matteo Berrettini of Italy on Day one of 2026 Rolex Shanghai Masters at Qi Zhong Tennis Centre on October 07, 2026 in Shanghai, China. (Photo by Shi Tang/Getty Images)

SHANGHAI, CHINA - OCTOBER 07: Matteo Berrettini of Italy returns a shot in the Men's Singles First Round match against Aleksandar Kovacevic of the United States on Day one of 2026 Rolex Shanghai Masters at Qi Zhong Tennis Centre on October 07, 2026 in Shanghai, China. (Photo by Shi Tang/Getty Images)

SHANGHAI, CHINA - OCTOBER 07: Matteo Berrettini of Italy returns a shot in the Men's Singles First Round match against Aleksandar Kovacevic of the United States on Day one of 2026 Rolex Shanghai Masters at Qi Zhong Tennis Centre on October 07, 2026 in Shanghai, China. (Photo by Shi Tang/Getty Images)

SHANGHAI, CHINA - OCTOBER 07: Matteo Berrettini of Italy returns a shot in the Men's Singles First Round match against Aleksandar Kovacevic of the United States on Day one of 2026 Rolex Shanghai Masters at Qi Zhong Tennis Centre on October 07, 2026 in Shanghai, China. (Photo by Shi Tang/Getty Images)

SHANGHAI, CHINA - OCTOBER 07: Matteo Berrettini of Italy reacts in the Men's Singles First Round match against Aleksandar Kovacevic of the United States on Day one of 2026 Rolex Shanghai Masters at Qi Zhong Tennis Centre on October 07, 2026 in Shanghai, China. (Photo by Shi Tang/Getty Images)

SHANGHAI, CHINA - OCTOBER 07: Aleksandar Kovacevic of the United States returns a shot in the Men's Singles First Round match against Matteo Berrettini of Italy on Day one of 2026 Rolex Shanghai Masters at Qi Zhong Tennis Centre on October 07, 2026 in Shanghai, China. (Photo by Shi Tang/Getty Images)

SHANGHAI, CHINA - OCTOBER 07: Matteo Berrettini of Italy returns a shot in the Men's Singles First Round match against Aleksandar Kovacevic of the United States on Day one of 2026 Rolex Shanghai Masters at Qi Zhong Tennis Centre on October 07, 2026 in Shanghai, China. (Photo by Shi Tang/Getty Images)

SHANGHAI, CHINA - OCTOBER 07: Matteo Berrettini of Italy returns a shot in the Men's Singles First Round match against Aleksandar Kovacevic of the United States on Day one of 2026 Rolex Shanghai Masters at Qi Zhong Tennis Centre on October 07, 2026 in Shanghai, China. (Photo by Shi Tang/Getty Images)