Ekaterina Makarova came to the Citi Open semi-finals when Simona Halep resigned in the third arrangement of their match in Washington.
Warmth ailment was obviously the explanation behind the best seeded Romanian's retirement soon after she lost the second arrangement of the quarter-last at Rock Creek Park Tennis Center.
The Russian's 2 6-3 1-0 achievement implies she will confront Oceane Dodin for a place in the last, after the Frenchwoman's 5-7 6-4 7-6 (7/4) annihilation of Germany's Sabine Lisicki.
he other semi-last is an all-German undertaking.
Julia Goerges beat Romania's Monica Niculescu 6-3 6-4 to set up a match against Andrea Petkovic, who beat Canada's Bianca Andreescu 6-7 (3/7) 6-1 6-2.
