World number two Simona Halep announced she is withdrawing from the upcoming US Open due to COVID-19 concerns.
"After weighing up all the factors involved and with the exceptional circumstances in which we are living, I have decided that I will not travel to New York to play the @usopen," she wrote on Twitter.
"I always said I would put my health at the heart of my decision and I therefore prefer to stay and train in Europe. I know the @usta and @WTA have worked tirelessly to put on a safe event and I wish everyone there a successful tournament."
She joined world number one Ash Barty, defending champion Bianca Andreescu, Elina Svitolina, Kiki Bertens and Belinda Bencic in skipping the event at Flushing Meadows over health and safety concerns.
It leaves the women's draw at the Grand Slam tournament without six of the world's top-10 players.
An 83rd-minute Weverton own goal from a deflected Malo Gusto cross gave Chelsea a nervy 2-1 win over a spirited Palmeiras side in the Club World Cup quarter-finals on Friday.
Women's top seed Aryna Sabalenka fought off inspired home favourite Emma Raducanu in a cauldron-like Centre Court atmosphere to keep her Wimbledon quest on track but it was the end of the road for two other Grand Slam champions on Friday.
India finished day three of the second test on 64-1 to lead England by 244 runs after they dismissed the hosts for 407 in the first innings at Edgbaston on Friday despite Jamie Smith's commanding and unbeaten knock of 184.
There were to be no Fourth of July celebrations for American Madison Keys as she joined the exodus of seeds from Wimbledon with a 6-3 6-3 defeat by 104th-ranked German Laura Siegemund in the third round on Friday.
Prime Minister Luis Montenegro joined members of Diogo Jota’s family for a private wake on Friday in the Liverpool footballer’s hometown in northern Portugal following his death alongside his brother Andre Silva in a car crash in Spain.