Though he doesn't own any clay-court titles, Khachanov's best Grand Slam runs have come at the French Open, with a 2019 quarterfinal appearance and three other trips to the fourth round.

Big-serving Ben Shelton is through to the Round of 16 and one of his serves during his 6-3, 7-5 win over No. 22 seed Karen Khachanov was among the fastest of all time. He had a stinging serve ...