Germany's Alexander Zverev smiles after winning the men's singles semi-final tennis match against Russia's Karen Khachanov on day thirteen of the US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York City on September 11, 2026. (Photo by CHARLY TRIBALLEAU / AFP via Getty Images)

Germany's Alexander Zverev reacts after winning the men's singles semi-final tennis match against Russia's Karen Khachanov on day thirteen of the US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York City on September 11, 2026. (Photo by TIMOTHY A. CLARY / AFP via Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 11: Alexander Zverev of Germany celebrates match point after defeating Karen Khachanov during their Men's Singles Semifinal match on Day Thirteen of the 2026 US Open at USTA Billie Jean King National Tennis Center on September 11, 2026 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Sarah Stier/Getty Images)

Germany's Alexander Zverev (L) and Russia's Karen Khachanov shake hands after Zverev's victory in the men's singles semi-final tennis match on day thirteen of the US Open tennis tournament at the USTA Billie Jean King National Tennis Center in New York City on September 11, 2026. (Photo by TIMOTHY A. CLARY / AFP via Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 11: Alexander Zverev of Germany celebrates match point after defeating Karen Khachanov during their Men's Singles Semifinal match on Day Thirteen of the 2026 US Open at USTA Billie Jean King National Tennis Center on September 11, 2026 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Sarah Stier/Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 11: Alexander Zverev of Germany celebrates match point after defeating Karen Khachanov during their Men's Singles Semifinal match on Day Thirteen of the 2026 US Open at USTA Billie Jean King National Tennis Center on September 11, 2026 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Al Bello/Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 11: Alexander Zverev of Germany serves against Karen Khachanov during their Men's Singles Semifinal match on Day Thirteen of the 2026 US Open at USTA Billie Jean King National Tennis Center on September 11, 2026 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Patrick Smith/Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 11: Alexander Zverev of Germany celebrates match point after defeating Karen Khachanov during their Men's Singles Semifinal match on Day Thirteen of the 2026 US Open at USTA Billie Jean King National Tennis Center on September 11, 2026 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Al Bello/Getty Images)