Alex Michelson has reached the fourth round at a Grand Slam tournament for the first time. He got there with a 6-3, 7-6 (5), 6-2 victory over No. 19 seed Karen Khachanov of Russia at the Australian Open on Saturday.

Two friends from California, Learner Tien and Alex Michelsen, have both reached the fourth round at the Australian Open. Tien is 19, and Michelsen is 20. They are two of

Two of four American men still playing in Melbourne, Irvine native Tien, 19, and Aliso Viejo native Michelsen, 20, became friends on the youth tennis circuit

Two friends from California, Learner Tien and Alex Michelsen, have both reached the fourth round at the Australian Open. Tien is 19, and Michelsen is 20.