Canadian teenager Leylah Fernandez has followed up her upset of defending champion Naomi Osaka at the U.S. Open by beating another past title winner at Flushing Meadows.

Carlos Alcaraz is the youngest male quarterfinalist at the U.S. Open since 1963.

Second-seeded Daniil Medvedev came from two sets down to beat former Wimbledon finalist Marin Cilic and reach the fourth round of the grass-court Grand Slam for the first...