WASHINGTON -- WASHINGTON (AP) — Emma Raducanu dominated her first career matchup against Naomi Osaka, winning the showdown at the D.C. Open on Thursday between past U.S. Open champions 6-4, 6-2.

The 2021 US Open winner, who had fallen out of the top 300 before returning to the top 50, advances to the tournament quarterfinals.

Emma Raducanu handed No. 7 seed Marta Kostyuk a sixth consecutive loss Tuesday, defeating her 7-6 (4), 6-4 at the DC Open to prolong a slide that now has lasted more than two months. This was the fifth tournament in a row where Kostyuk exited in the first round;