Emma Raducanu has made a worrying admission ahead of her semi-final clash against Anna Kalinskaya at the Washington Open on Saturday. The British tennis star has reached the last four at a WTA Tour event for the first time this year and has been in brilliant form at the American tournament.

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

Emma Raducanu booked her place in the semi-final of the Washington Open for the first-time with a 6-4 7-5 victory over Greece's Maria Sakkari. The victory, on a day where both players had to battle high temperatures, means Raducanu will overtake Katie Boulter as British number one on Monday.