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.
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.
