No. 17 Frances Tiafoe continued a strong start by American men at the US Open, defeating Yoshihito Nishioka in straight sets Monday to reach the second round.

Frances Tiafoe weathered a Ben Shelton storm in a captivating all-American blockbuster to win 4-6, 7-5, 6-7 (5), 6-4, 6-3 and move into the last 16 of the US Open on Friday. Both players have had semifinal runs at Flushing Meadows in the past and it was the electric Tiafoe who prevailed in a four-hour battle in what was a repeat of last year's quarterfinal matchup,