Alexander Blockx, of Belgium, has his foot checked during a medical timeout during a match against Karen Khachanov, of Russia, during the quarterfinal round of the U.S. Open tennis championships, Wednesday, Sept. 9, 2026, in New York. (AP Photo/Kirsty Wigglesworth)

Alexander Blockx, of Belgium, has his back worked on during a medical timeout during a match against Karen Khachanov, of Russia, during the quarterfinal round of the U.S. Open tennis championships, Wednesday, Sept. 9, 2026, in New York. (AP Photo/Kirsty Wigglesworth)

Alexander Blockx, of Belgium, left, meets Karen Khachanov, of Russia, at the net after Blockx was forced to retire due to an apparent injury during the quarterfinal round of the U.S. Open tennis championships, Wednesday, Sept. 9, 2026, in New York. (AP Photo/Kirsty Wigglesworth)

Alexander Zverev, of Germany, reacts after winning a point against Botic van de Zandschulp, of the Netherlands, during the quarterfinal round of the U.S. Open tennis championships, Wednesday, Sept. 9, 2026, in New York. (AP Photo/Adam Hunger)

FILE - Luxury homes are under construction in a subdivision, May 22, 2007 in New Albany, Ohio. (AP Photo/Kiichiro Sato, File)

FILE -Travelers queue up to pass through the south security checkpoint in Denver International Airport Wednesday, July 2, 2025, in Denver. (AP Photo/David Zalubowski, File)

Yemen's Houthi rebels walk carrying weapons during a mobilization campaign in Sanaa, Yemen, Thursday, Sept. 10, 2026.(AP Photo)

Trader Edward Curran works on the floor of the New York Stock Exchange, Thursday, Aug. 27, 2026, in New York. (AP Photo/Yuki Iwamura)