Nonito Donaire's clash with Alexandro Santiago for the vacant WBC bantamweight title has been moved to the undercard of Errol Spence vs. Terence Crawford.
The contest was originally set to take place on July 15, but has now been pushed to fill out the Spence vs. Crawford card after Viktor Faust was forced to pull out of his clash with Gurgen Hovhannisyan due to injury.
Donaire already holds the record for the oldest fighter to become bantamweight champion, at 38, and he could break that by a further two years on Saturday.
Here's everything you need to know about Donaire vs. Santiago.
The event is set to get underway at 8 p.m. ET / 1 a.m. BST with the Donaire vs. Santiago ringwalks scheduled for roughly 10 p.m. ET / 3 a.m. BST. These timings could change due to the length of the undercard fights.
Fans in the U.S. can purchase the fight on Showtime PPV, while UK fans can watch the fight on TNT Sports Box Office (formerly known as BT Sport Box Office)
The fight will take place at The Cosmopolitan of Las Vegas, Chelsea Ballroom, Las Vegas, Nevada.