Novak Djokovic charged into a record 47th Grand Slam semi-final on a steamy Tuesday at the US Open with a straight-sets win over Taylor Fritz, while home favourite Coco Gauff stayed on track for her first major title. Djokovic shrugged off ninth seed Fritz 6-1, 6-4, 6-4 to extend his dominance of American players in New York and take another step closer to a record-extending 24th men's Grand Slam title. The 36-year-old Serbian star will appear in his 13th US Open semi-final, eclipsing the mark he shared with longtime nemesis Roger Federer for most appearances in the last four of a Grand Slam.