Oscar De La Hoya hospitalized with COVID-19; Vitor Belfort will now face Evander Holyfield on Sept. 11

Oscar De La Hoya announced from a hospital bed that he has tested positive for COVID-19 and won't be able to fight former UFC champion Vitor Belfort on Sept. 11 in a Triller Fight Club PPV.

The Hall of Fame boxer was set to compete for the first time since a December 2008 TKO loss to Manny Pacquiao.

De La Hoya, who says he is vaccinated, briefly described his bout with the virus in a video posted on Twitter on Friday.

Triller's Ryan Kavanaugh told ESPN that Evander Holyfield has agreed to terms to step in and fight Belfort. Holyfield, 58, hasn't fought since a 2011 TKO victory over Brian Nielsen.

Kavanaugh said the contracts call for pro-fight rules contested over eight two-minute rounds. De La Hoya-Belfort was set to take place at Staples Center in Los Angeles (where De La Hoya was born and still resides), but Triller plans to hold Holyfield-Belfort at Hard Rock Live in Hollywood, Florida, sources told ESPN.

The California State Athletic Commission refused to sanction Holyfield-Belfort, sources told ESPN's Marc Raimondi.

"Heavyweight fights are always the most exciting clashes, and this is a heavyweight fight between two true warriors," Kavanaugh said. "We really wish Oscar a speedy recovery, he's a champion and a warrior; we know he'll fight this and win. We look forward to seeing him in the ring on the anniversary of Fight Club's launch."

Triller Fight Club debuted in November with the Mike Tyson-Roy Jones Jr. exhibition event, a commercial success. Kavanaugh said they are now seeking opponents for De La Hoya to fight on Thanksgiving weekend.

The entire undercard, including the David Haye-Joe Fournier exhibition bout, will move to Florida, Kavanaugh said.

Holyfield (44-10-2, 29 KOs) is one of the greatest heavyweight boxers of all time. He owns two wins over Mike Tyson and a victory over George Foreman. Known for his fighting spirit, the Atlanta resident also is one of the most beloved fighters of all time. Holyfield signed to fight Kevin McBride on Triller Fight Club earlier this year, but the bout was scrapped due to medical concerns regarding McBride. McBride, 48, was deemed a plus-6 on the Boxing Severity Index by the California State Athletic Commission, a high-risk boxer.

Belfort, 44, will be boxing for the second time in his career. His pro boxing debut came in 2006, a first-round KO in Brazil.

The Brazilian is a former UFC light heavyweight champion who owns a black belt in Brazilian jiu-jitsu under Carlson Gracie. Belfort also owns a black belt in judo. Known for his explosive power, he's tied for the third-most finishes in UFC history with 14. Belfort's third run with UFC ended in 2018 with a KO loss to Lyoto Machida at UFC 224.