Daniel Dubois won against Anthony Joshua by knocking him out in the fifth round on Saturday. This means Dubois kept his IBF heavyweight title.
Dubois gave a great performance in front of a big crowd of 96,000 people at Wembley Stadium in London.
Dubois, who is 27 years old, knocked Joshua down four times. In the fifth round, he hit Joshua on the chin and won the match.
This loss is a big problem for Joshua. He was hoping to fight the winner of the December 21 match between Oleksandr Usyk and Tyson Fury.
Now, Dubois will get a chance to fight that winner, as he has now won 21 out of his 24 fights.