Four Portsmouth FC players have tested positive for coronavirus.
The League One club said test results received on Friday night revealed James Bolton, Andy Cannon and Sean Raggett have the virus.
After receiving results from another batch of tests, the club said teenage defender, Haji Mnoga had also tested positive for the virus.
They are self-isolating and are showing mild or no symptoms. The club said: "we send our best wishes to all of them".
In a statement the club said they were all "in good spirits and perfectly calm".
Portsmouth chief executive Mark Catlin said: "Football is not immune from this virus and I can assure you that it only really hits home when those that you know contract it.
"We once again urge everyone to follow the current government guidelines."
The club has tested all players and first team staff for the virus. It said it was waiting for the results of 10 more tests.
The club said it had notified Public Health England.