New York — Serena and Venus Williams set up a 30th career meeting on Wednesday as the US Open reeled from a sexism row sparked when a player changed her shirt on court. Six-time champion Serena eased into Friday’s third-round encounter against her sister with a 6-2 6-2 win over German world No101 Carina Witthoeft posting 30 winners and 13 aces. Venus, the 2000 and 2001 champion, made the third round for the 17th time with a 6-4 7-5 victory over a game Camila Giorgi of Italy. Friday’s match will be the earliest the sisters have met at a Slam since the 1998 Australian Open in what was also their first clash. It will be their sixth face-off in New York. "Friday will be incredibly hard," said Serena, before jokingly hitting back at Venus’s claim that when they last met at a Grand Slam in the 2017 Australian Open final her sister had an advantage, as it was "two against one". That was a reference to Serena being in the early stages of pregnancy with her daughter Olympia. "I guess I had a...

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