• Kei Nishikori defeated Marin Cilic in five sets to advance to the U.S. Open semifinals for the third time.
• Naomi Osaka, a 20-year-old from Japan, reached her first Grand Slam semifinal, where she will play Madison Keys, last year’s U.S. Open runner-up.
• Refresh here for live results and analysis from Day 9 of the 2018 U.S. Open
• Live scores and schedule: Men | Women
• Read our coverage of Tuesday’s quarterfinals.
