gabriel diallo

Montreal’s Gabriel Diallo advanced to the third round of the Citi Open hardcourt tennis tournament with a 6-3, 6-4 win over Hungary’s Fabian Marozsan on Tuesday.

Diallo, who had a first-round bye as the 15th seed in Washington, had 10 aces and broke Marozsan twice on seven chances.

Marozsan, who committed six double faults, failed to convert the only chance he had to break Diallo’s serve.

Diallo improved to 2-0 against Marozsan, with his other win coming earlier this year in a Davis Cup qualifier.

He will next face the winner of an all-American match between fourth seed Ben Shelton and wild card Mackenzie McDonald.

Diallo, who entered the tournament with a career-high world ranking of No. 35, is seeded 30th at the men’s National Bank Open in Toronto. The Masters-level event starts with qualifying on Saturday.