US Open: Injury haunts valiant Dimitrov, Tiafoe vs Fritz in all-American semis
US Open 2024: Frances Tiafoe returned to the semi-final in New York for the first time since 2022 after his opponent, Grigor Dimitrov, retired with an injury in the quarter-final on Tuesday. Tiafoe will face compatriot Taylor Fritz in the first all-American semi-final at a Grand Slam since 2005.
