Americans Gauff, Tiafoe, Nakashima and Pegula reach the semifinal round at Cincinnati Open

MASON, Ohio (AP) — Frances Tiafoe and Brandon Nakashima won quarterfinal matches Friday night to set up one all-American men’s semifinal at the Cincinnati Open. Coco Gauff and Jessica Pegula also advanced to make it four U.S. players in the semis. “It’s insane, I think we’re all doing so well,” Gauff said. “Hopefully, you know,...