The top US health and infectious disease specialist says the key to reopening professional sports leagues in America is to have the athletes play games in front of empty stadiums.

Anthony Fauci, who is helping coordinate the US response to the global coronavirus pandemic, said reliable antibody testing and fast results are also crucial to the return of sports.

"There's a way of doing that," Fauci told US Snapchat show "Good Luck America." "Nobody comes to the stadiums. Put (athletes) in big hotels, wherever you want to play.

Dr Anthony Fauci says widespread testing, social distancing and empty stadiums are the key to getting US sports up and running again
Dr Anthony Fauci says widespread testing, social distancing and empty stadiums are the key to getting US sports up and running again AFP / MANDEL NGAN

"Keep them very well-surveilled, but have them tested like every week and make sure they don't wind up infecting each other or their families, and just let them play the season out."

Professional sports leagues are in gridlock due to the pandemic that has so far killed nearly 28,000 Americans.

The National Basketball Association is pondering a similar model for getting their 2019-20 season restarted in either Las Vegas or the Bahamas.

The NBA shut down on March 11 after Utah Jazz center Rudy Gobert tested positive for the virus, and the National Hockey League, Major League Soccer and the Professional Golfers' Association Tour quickly followed suit.

Los Angeles Mayor Eric Garcetti said that his California city might not host large gatherings, such as sporting events and concerts, before 2021
Los Angeles Mayor Eric Garcetti. AFP / Robyn Beck

The PGA is reportedly considering a return on June 11 without fans in attendance, starting with a tournament in Fort Worth, Texas, which was originally scheduled for the weekend of May 21-24.

The matches would not be played in front of fans, and the PGA may have to play on gallery-free courses for at least the months of June and July.

Eight Tour events were postponed on March 17. The PGA Championship and Masters were rescheduled for later in the season.

Major League Baseball's 2020 season, which was due to start March 26, is on hold, as is the LPGA tour and motor racing, while the National Football League is just hoping it will be able to start its season on time in September.

The NBA shut down on March 11, 2020 after Utah Jazz center Rudy Gobert tested positive for the novel coronavirus
The NBA shut down on March 11, 2020 after Utah Jazz center Rudy Gobert tested positive for the novel coronavirus AFP / GEORGE FREY

New York mayor Bill de Blasio said Wednesday he doesn't want to see large-scale sporting events and concerts with fans come back for a long time.

"Those big events should be one of the last things we should bring back online. The last thing we should do is gather 10,000, 20,000, 50,000 people in one place," de Blasio told CNN.

"That is the opposite of social distancing, so I think it could take quite a while."

Los Angeles Mayor Eric Garcetti said Monday that his California city might not host large gatherings, such as sporting events and concerts, before 2021.

"It would be very difficult to see that," Garcetti said when asked if events would resume in this calendar year.

Also, Jeffrey Smith, the chief executive for Santa Clara County in northern California, told ESPN that more people will die if events are staged too early and that only a "major miracle" could lead to the 2020 NFL season starting on time.

"It puts the entire country at risk," said Smith, who overseas the area that includes the NFL's San Francisco 49ers and the NHL's San Jose Sharks as well as several US college teams.

"The fundamental thing is sports is not a local event. If you have people travelling from all over and you have no way of knowing whether they're infected or not -- I mean, 50,000 of them in a stadium is not a good idea."

Coronavirus Infection