Andy Ruiz Jr has another opportunity to shock the world as he takes on Anthony Joshua tonight in their heavyweight rematch.
The Mexican-American stunned the sport of boxing in June when he dropped Joshua four times before stopping him in the seventh round in New York.
It was Joshua's first defeat as a professional as he relinquished the three world titles he had worked so hard to earn.
He has had six months to figure out a game plan to win back his belts as he walks to the ring in Saudi Arabia this evening.
Before that there is plenty of heavyweight action on the undercard as Dillian Whyte makes his return despite the controversy surrounding his failed drug test in July.
Here is everything you need to know about tonight's fights...
Fight time
The ring walks will take place at 8.45pm UK time with the fight starting shortly after 9pm. In the United States, the fight will start at 4pm on the east coast and 1pm on the west coast.
TV channel
The fight will be broadcast on Sky Sports Box Office in the UK and will cost £24.95. The programme will start at 5pm and you can purchase the pay-per-view by clicking here .
In America, the fight will be streamed on DAZN.
Live stream
The fight can be streamed via the Sky Sports website while illegal streams will be clamped down upon to avoid piracy.
Undercard
Alexander Povetkin vs Michael Hunter
Filip Hrgovic vs Eric Molina
Dillian Whyte vs Mariusz Wach
Mahammadrasul Majidov vs Tom Little
Ivan Price vs Swedi Mohamed
Diego Pacheco vs Selemani Saidi
Odds
Anthony Joshua 4/9
Andy Ruiz Jr 7/4
Draw 28/1
* Odds subject to change
Latest news
Lennox Lewis has questioned why Anthony Joshua was allowed to brand him "a clown".
Joshua made the comment earlier this year after Lewis criticised him for not fighting then fellow heavyweight world champion Deontay Wilder .
Joshua went on to lose his belts to Andy Ruiz Jr in June and will attempt to win them back in Saudi Arabia on Saturday.
If he loses again, his dream of becoming the first undisputed champion since Lewis will be in tatters.
And Lewis told the Undefeated podcast : "When AJ said Lennox Lewis is a clown, everybody was allowing him to say it but not asking him why.
"Why would he say that about the last undisputed champion, a legend? Please, tell me why he would say that.
"I said he should have fought Wilder because if he wants to be the next undisputed he's got to fight Wilder.
"If you want to fight a guy then offer him proper money and don't allow your manager... you control your manager, tell him you want the fight.
"No-one can say I ducked anybody, if I wanted a fight we negotiated a proper sum and we fought, we didn't give them pittance, you've got to give a man proper money.
"Will he be remembered for what he's done or for how much money he's made?
"If he's the king of the hill he can control everything. He's doing his boxing career... who's his mentor? Who can he talk about real boxing with? Who knows the history of boxing?"
