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Haye, 40, has not stepped into the ring since his fifth-round TKO loss to Tony Bellew in May 2018, while nightclub owner Fournier, 38, boasts a pro boxing record of 9-0.
"It's not a comeback," Haye previously told Sky Sports, who have now been told of secretive talks to pair him with an exciting rival in a future fight.
Ahead of the fight, we take a look at what should be a thrilling fight and everything we know about it so far.
David Haye vs Joe Fournier takes place on Saturday, September 11.
The fight is on the undercard of Evander Holyfield vs Vitor Belfort at the Seminole Hard Rock Hotel & Casino in Florida.
It is expected the ring walk times for Haye vs Fournier will be around 3am BST, with the main event on at 4am.
Haye vs Fournier is set for eight rounds and will count on both boxers' pro records.
A TV channel for the card has yet to be announced for UK television.
Though you'll currently be able to watch live on FITE.TV.
The streaming only service will provide the undercard and main event for £9.99 in the UK.
David Haye is the overwhelming 1/20 favourite to win the fight, while Joe Fournier is priced at 7/1. A draw is priced at 16/1. Expect odds to change leading up to fight night.
If David Haye takes this fight seriously then he should make quick work of his return fight and we're backing him to end it in a knockout.
The Hayemaker claims he is planning on teaching his "overconfident billionaire buddy" a lesson in the ring.
If Haye is a man of his word, then this may not last long, hence the short odds on the 40-year-old to win the bout.
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