Serena Williams passed her toughest test so far at the US Open to beat Karolina Pliskova and reach the semi-finals for a ninth consecutive time.
Williams, seeded 17th, trailed 4-2 in the first set but hit back to win 6-4, 6-3 against the Czech eighth seed.
The American, 36, is seeking her first Grand Slam trophy since giving birth to daughter Olympia last September.
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If she wins it would be her 24th major title – equalling Australian Margaret Court’s all-time record.
“I don’t think I have another 10 years of having opportunities to be able to play and win championships,” said former world number one Williams.