Serena Williams made light work of her older sister Venus Williams to reach the US Open fourth round in New York.
The 23-time Grand Slam champion, looking to equal Margaret Court’s all-time record of 24, needed just 71 minutes to win 6-1 6-2.
The American siblings, aged 38 and 36, were playing for the 30th time – but it was not much of a contest.
Serena Williams, who had a medical timeout in the first set, will play Estonia’s Kaia Kanepi in the last 16.
Kanepi, 33, dumped world number one Simona Halep out in the first round and has not dropped a set so far at Flushing Meadows.
“This was my best match since I have returned,” said Serena, who had time out of the game to give birth to her daughter last September.