Deontay Wilder was taken to the hospital following his stunning knockout loss to Tyson Fury in Las Vegas.
The American was knocked down on three occasions in a fight of the year contender. The bout was waved off immediately by referee Russell Mora after Wilder was heavily floored for a third and final time in the 11th round.
Wilder was defeated for the second time in a row by the Brit, who retained his WBC title, and the American will now undergo precautionary testing in the hospital.
Wilder, 35, will not be held overnight, according to his manager Shelly Finkel, who claims he is in good condition.
Boxing journalist Dan Rafael tweeted: ‘Was texting with Wilder’s manager Shelly Finkel.
‘Said Deontay is OK and won't be staying at the hospital overnight.'
After the fight, Wilder spoke up, saying that he had no idea what went wrong.
'I tried my hardest, but it wasn't enough tonight,' he admitted. ‘I have no idea what happened.' I knew he did certain things in training, and I also knew he didn't weigh 277 pounds to be a ballet dancer.
'He came to lean on me and rough me up, and he was successful.'