Sport across the United States and Canada ground to a virtual standstill on Thursday with baseball, soccer and ice hockey leagues joining basketball by declaring an immediate halt to play as fears of the coronavirus decimated the sporting landscape.
A day after the NBA stunned fans by announcing an indefinite suspension of the basketball season, Major League Baseball, Major League Soccer and the National Hockey League all followed suit.
MLB commissioner Rob Manfred said the start of the baseball season on March 26 would be postponed by at least two weeks while Spring Training games were suspended with immediate effect as the US grappled with what Manfred described as a "national emergency."
The NHL meanwhile said it was stopping its season indefinitely, just as ice hockey heads into its crucial playoff season.
Major League Soccer had earlier announcing a 30-day halt to its competition.
The US Soccer Federation also cancelled upcoming international friendlies and training camps at all levels, scrapping two US men's games against the Netherlands and Wales later this month.
Two US women's fixtures -- against Australia in Utah on April 10 and another against Brazil in San Jose California on April 14 -- were also axed.
In Florida, the ATP/WTA Miami Open was called off as Miami-Dade County Mayor Carlos Gimenez declared a state of emergency over the outbreak.
The hardcourt tennis tournament, one of the world's top events outside of the Grand Slams, was scheduled to begin with qualifying on March 23 and run through April 5.
The decision followed the cancellation of the Indian Wells tournament due to start in California this week. ATP Tour chiefs in London later declared a six-week suspension of the men's tennis calendar.
In another blow for basketball, the National Collegiate Athletic Association cancelled the US national men's basketball tournament, known popularly as "March Madness".
The NCAA decision came shortly after major US college basketball conference tournaments shut down nationwide, mirroring the NBA.
Other sports, meanwhile, were preparing to stage events without spectators following warnings from US health officials that large gatherings of fans posed a risk of escalating the outbreak.
- Golf fans locked out -
The opening leg of IndyCar's 2020 season will get under way on Sunday against a backdrop of empty viewing stands after spectators were banned by city officials in St. Petersburg, Florida.
In golf, meanwhile, the PGA Tour announced a ban on spectators at all of its events starting with Friday's second round at The Players Championship in Ponte Vedra Beach in Florida.
The spectator ban runs all the way up to the final tune-up event before next month's Masters at Augusta, the opening major of the seasons.
"I feel pain for the spectators," said South Africa-born Slovakian golfer Rory Sabbatini on Thursday. "I hope we can get this under control and get everybody back out there.
The women's LPGA Tour meanwhile announced a series of postponements with three tournaments, including the opening major of 2020, the ANA Inspiration in California, being pushed back.
"The plan is to reschedule these events for later dates in the 2020 season," an LPGA statement said.
The swathe of cancellations, suspensions and spectator lockouts is unprecedented in the history of modern US sport, with only the shutdown following the September 11, 2001 attacks coming close to matching the present turmoil.
Sports team officials said Thursday that the shutdown became inevitable after the disclosure on Wednesday that Utah Jazz basketball player Rudy Gobert had tested positive for the virus.
The NBA immediately announced all play in the league had been suspended until further notice. A second Utah player, Donovan Mitchell, has also contracted the virus.
"I thought for the past week that as soon as a player tested positive, it could be a tipping point," said Jorge Mas, one of the co-owners of David Beckham's MLS team Inter Miami, who had been preparing for their first ever home game this weekend.
Meanwhile, Utah Jazz ace Gobert issued an apology for not taking threats of the coronavirus seriously.
The Frenchman said he had "no excuse" for disregarding safety warnings about the disease.
Gobert had triggered scorn on social media on Monday after pointedly touching every microphone and voice recorder on a table in front of him at a media availability.
"The first and foremost thing is I would like to publicly apologise to the people that I may have endangered," Gobert said.
"At the time, I had no idea I was even infected. I was careless and make no excuse. I hope my story serves as a warning and causes everyone to take this seriously."
Major League Soccer became the latest league to suspend its season over coronavirus fears
Spectators will be barred from attending PGA Tour events until at least next month's Masters