Jenson Brooksby, looking to build on the best tournament of his brief ATP Tour career, defeated 16th-seeded Frances Tiafoe 7-6 (4), 7-5 on Tuesday in the second round of the Citi Open.
The match featured a pair of young U.S. players.
Brooksby, 20, had never reached an ATP Tour quarterfinal before advancing all the way to the final at Newport, R.I., last month. Tiafoe, 23, is a Washington-area native.
Next up for Brooksby is a matchup with second-seeded Canadian Felix Auger-Aliassime, who beat Italy's Andreas Seppi 2-6, 6-2, 6-2 on Tuesday.
Also reaching the third round were seventh-seeded Cameron Norrie of the United Kingdom, 12th-seeded Sebastian Korda of the United States and Ricardas Berankis of Lithuania.
First-round winners Tuesday were Finland's Emil Ruusuvuori, Swedish qualifier Elias Ymer and five U.S. players: Steve Johnson, Denis Kudla, Mackenzie McDonald, Brandon Nakashima and Tennys Sandgren.
--Field Level Media