Heat forces top-seeded Halep to retire at Citi Open

(Photo by Chaz Niell/Icon Sportswire via Getty Images)

(TSX / STATS) -- Top-seeded Simona Halep was forced to retire due to heat exhaustion while losing her quarterfinal match against Ekaterina Makarova at the Citi Open on Friday at Washington.

On-court temperatures reportedly soared up to 116 degrees and Halep withdrew after losing the first game of the final set, giving Makarova a 2-6, 6-3, 1-0 victory that pushed the Russian into Saturday's semifinals.

Halep rolled through the opening set before the seventh-seeded Makarova recovered to win the second set. Halep was notably sluggish in the later stages and called for a tournament doctor during the changeover.

Makarova rolled through the opening game of the third set and the Romanian decided she could no longer continue.

Fourth-seeded Julia Goerges of Germany posted a 6-3, 6-4 win over sixth-seeded Monica Niculescu of Romania.

Fifth-seeded Frenchwoman Oceane Dodin faced a tougher challenge on Friday, rebounding from dropping the first set to post a 5-7, 6-4, 7-6 (4) victory over German Sabine Lisicki.

German Andrea Petkovic also needed to collect herself after losing the first set before rallying to a 6-7 (3), 6-1, 6-2 win over Canadian Bianca Vanessa Andreescu.

Updated August 5, 2017