On a muggy day with the temperature topping 90 degrees Fahrenheit (32 Celsius), Raducanu took a medical timeout while reeling off the last five games of the match after trailing 5-2 in the second set.

Britain's Emma Raducanu qualifies for the semi-finals of the Washington Open after beating wildcard Maria Sakkari in straight sets.

Williams could not overcome 27-year-old Magdalena Frech, 6-2, 6-2, in the second round of the tournament on Thursday, July 24. Williams has not won back-to-back matches since 2019. Venus Williams and Hailey Baptiste won their first-round match in doubles play on Monday, but the duo fell short of reaching the third round.

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

Britain's Emma Raducana is through to the quarter-finals of the Washington Open after beating Naomi Osaka in straight sets but Cameron Norrie and Dan Evans lose.