One of cycling's grand tours was heavily impacted by COVID-19 with Australian rider Michael Matthews among those to test positive while soccer superstar Cristiano Ronaldo and the world's top golfer have also contracted coronavirus.
Five teams contesting the Giro d'Italia were hit by COVID-19 cases on the first rest day, with two of them pulling out of the three-week race 12 days before the finish in Milan.
Australia's Mitchelton-Scott team withdrew on Tuesday after four staff members tested positive for coronavirus, following top rider Simon Yates pulling out last week when he was found to have COVID-19.
Jumbo-Visma, whose team leader Steven Kruisjwijk tested positive, said they would not start the 10th stage for the safety of everyone involved.
Meanwhile, Team Sunweb confirmed Matthews had tested positive with sports director Luke Roberts saying the Australian was asymptomatic.
Meanwhile, five-times world player of the year Ronaldo became the highest profile sportsperson to contract the virus.
The Juventus forward is on national team duty with Portugal with the country's soccer federation confirming his positive result, forcing him out of their Nations League game against Sweden on Wednesday while he self-isolates.
"He is completely asymptomatic, he is OK, without any symptoms, he doesn't even know what happened to him," Portugal coach Fernando Santos told a news conference.
Iceland will replace coach Erik Hamren and his entire backroom team for Wednesday's Nations League clash with Belgium in Reykjavik after an unnamed staff member contracted COVID-19.
A Republic of Ireland football player tested positive for the virus and was withdrawn from the squad for Wednesday's UEFA Nations League game in Finland.
In golf, top-ranked Johnson has pulled out of this week's CJ Cup after testing positive for COVID-19, the PGA Tour confirmed.
The "disappointed" American notified Tour officials he was experiencing symptoms and was administered a test, leading to his withdrawal from the Las Vegas event as he begins to self-isolate.
The NFL has no plans to move into a bubble as it takes several new steps to combat the spread of the coronavirus.
The updated protocols came hours before the Tennessee Titans were scheduled to host the Buffalo Bills in their first game since an outbreak shut down team facilities and forced the schedule to be rearranged.
Rugby league Challenge Cup finalists Salford announced two players tested positive for coronavirus just four days before their Wembley showdown with Leeds.