Emma Raducanu is into the semi-finals at the Citi Open as she defeated Maria Sakkari in straight sets in Washington, DC. The British No1, who reclaimed her place at the top of the national rankings with her last-16 win over Naomi Osaka in the previous round, came through 6-4 7-5.

Emma Raducanu beats Maria Sakkari to reach final four in Washington in preparation ahead of next months US Open; watch the Mubadala Citi DC Open live on Sky Sports Tennis

Emma Raducanu takes on Greek wildcard Maria Sakkari in the quarter-finals of the Washington Open today. Raducanu saw off Naomi Osaka in straight sets in the second round, having stunned seventh seed Marta Kostyuk in her opening match.