Emma Raducanu reclaimed the British No 1 title with a powerful straight-sets win over four-time major winner Naomi Osaka at the Mubadala Citi DC Open.

Emma Raducanu beat four-times Grand Slam champion Naomi Osaka 6-4 6-2 in their first career meeting to reach the quarter-finals of the Washington Open on Thursday.

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.