World heavyweight champion Daniel Dubois withdrew on Thursday from his scheduled title defence against Joseph Parker on Saturday after falling ill.

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Daniel Dubois will defend his IBF world heavyweight title against Joseph Parker on Saturday in his first fight since dispatching Anthony Joshua.

Despite Parker beating Deontay Wilder and Zhilei Zhang in his previous two fights, Johnny Nelson did highlight that a younger Dubois is a different challenge altogether and believes that this could have a huge influence on the result in the Saudi Arabian capital.

Joseph Parker’s shot at returning to the ranks of world heavyweight boxing champions is in doubt, with Daniel Dubois believed to have fallen ill. The pair are scheduled to meet in Riyadh, Saudi Arabia on Sunday (NZ time) with Parker looking to dethrone the IBF title holder and begin his second reign as a world champion.

World heavyweight champion Daniel Dubois withdrew on Thursday from his scheduled title defence against Joseph Parker on Saturday after falling ill. Dubois, 27, who holds the IBF title, underwent a medical examination in Saudi Arabia and missed a scheduled press conference,

Daniel Dubois is in doubt for his heavyweight title fight against Joseph Parker due to illness, it has been confirmed.

Heavyweight Daniel Dubois' world title defence against Joseph Parker on Saturday is in doubt with reports that the champion is ill.

Daniel Dubois has been forced to pull out of his huge world title defence against Joseph Parker after falling ill 48 hours before the first bell in Saudi Arabia

Daniel Dubois has been forced out of his heavyweight co-main event against Joseph Parker after falling ill, which has forced a late replacement opponent to step up on just 48 hours’ notice.

Daniel Dubois has withdrawn from his IBF heavyweight world title defence against Joseph Parker due to illness, with Martin Bakole stepping in as a last-minute replacement for Saturday's fight in Saudi Arabia.