Boxing promoter Eddie Hearn has tested positive for coronavirus.
The Matchroom Sport chief made the announcement via social media on Thursday evening.
Hearn had been in Matchroom's bio-secure bubble in the build-up to Joshua Buatsi's WBA International light-heavyweight title defence against Croatian Marko Calic, which is due to take place at the Marshall Arena in Milton Keynes on Sunday.
He has now left the bubble and will immediately self-isolate at home in line with Government rules, though the show will continue as planned with everyone else involved testing negative.
"Gutted to just find out I tested positive for Covid-19 today and have to leave the bubble immediately," Hearn tweeted.
"Thankfully all other tests were negative. Heading home to rest - catch up tomorrow."
