Bertens opts out of US Open

Women's world number seven Kiki Bertens has joined a growing list of players withdrawing from this month's US Open due to the Covid-19 pandemic, the Dutch player said on Friday.

Men's defending champion Rafa Nadal and women's world number one Ashleigh Barty have also opted against travelling to New York to play the hardcourt Grand Slam as well as the Western & Southern Open that will work as a warmup for the US Open.

"After long consideration I have decided not to go to the States for Cincinnati and the US Open," the 28-year-old Bertens said on Instagram.

"The situation around Covid-19 is still worrying and the health of everyone and the control over this virus is priority."

The United States has close to 5 million cases of Covid-19 and almost 160,000 people have died, according to a Reuters tally.

The US Open organisers (USTA) are creating a bio-secure 'bubble' in New York to hold the tournament from Aug. 31 without spectators. But concerns remain about whether players would face mandatory quarantines upon returning home from the US Open.

Former world number one Andy Murray, who won the US Open in 2012, said on Monday that players travelling to New York needed assurance that they would not face mandatory quarantines after returning to Europe.

"Our prime minister indicated yesterday that we should be quarantined for 14 days after coming back from the States," Bertens said.

"Of course we respect this as a team and this would disturb our preparation for my beloved clay court tournaments in Rome and Paris. I hope the situation will soon take a positive turn and wish everyone good health," she said.

The Italian Open is scheduled to be held in Rome from Sept. 20 ahead of the French Open Grand Slam in Paris a week later.