Emma Raducanu cruised past four-time Grand Slam winner Naomi Osaka 6-4, 6-2 to reach the quarter-finals of the Washington Open in their first-ever meeting. The 2021 US Open champion will next face Maria Sakkari, who upset second seed Emma Navarro in straight sets.Raducanu praised Osaka’s strength on hard courts and was pleased with her own composure and serving under pressure. The Brit, who will reclaim the national No.1 ranking on Monday, is also into the women’s doubles semi-finals with Elena Rybakina.Meanwhile, 45-year-old Venus Williams' return ended in a 6-2, 6-2 defeat to Poland's Magdalena Frech after her historic opening-round win earlier this week.