Miami, Mar 20 (AP) Top-ranked Novak Djokovic pulled out of the upcoming Miami Open, citing coronavirus restrictions as he joined Rafael Nadal and Roger Federer on the sideline.

The tournament begins Tuesday, with only 750 fans allowed on the grounds per session. The pandemic is also affecting attendance by players.

"I decided to use this precious time at home to stay with my family," Djokovic said in a statement.

"With all restrictions, I need to find balance in my time on tour and at home."

Nadal pulled out Tuesday, citing a bad back that bothered him during the Australian Open. Federer, mounting a comeback from knee surgery, withdrew March 1. They're based overseas, as is Djokovic.

"This has been a difficult year for everyone," Miami Open tournament director James Blake said in a statement, "but especially for players with families."

There has been less attrition on the women's side. Serena Williams, Australian Open champion Naomi Osaka and No. 1 Ash Barty are among those scheduled to compete.

Barty won the tournament in 2019. It was canceled last year because of the pandemic.

Djokovic won his 18th Grand Slam title at the Australian Open last month. The Serb is in his 312th career week at No. 1 and recently broke Federer's record of 310 total weeks in the top spot. (AP)

(The above story is verified and authored by Press Trust of India (PTI) staff. PTI, India’s premier news agency, employs more than 400 journalists and 500 stringers to cover almost every district and small town in India.. The views appearing in the above post do not reflect the opinions of LatestLY)