Krejčíková reaches the quarterfinals of US Open

Barbora Krejčíková reached the quarterfinals of the US Open on Sunday after beating Spain’s Garbine Muguruza 6-3 7-6(4). However it was a tough match for the French Open champion, who called a medical time-out late in the second set, and was clearly in pain as she was helped off the court by medical staff. "At the end I was really struggling and I feel really bad right now," said Krejčíková, who skipped her post-match news conference but provided comments through the WTA. The Czech offered an apology to Muguruza as the pair shook hands at the net after the match. In her news conference Muguruza confirmed she was not happy with how things unfolded at the end but declined to elaborate.