MMA’s most high-profile star, Conor McGregor, was set to make his return at UFC 303 but has seen his comeback delayed through injury.
The UFC confirmed the Irish star's welterweight bout with American Chandler after UFC 300 in Las Vegas, but the fight has now been postponed.
Here is everything you need to know about the highly anticipated clash.
The fight is highly likely to be televised on TNT Sports Box Office, but details have yet to be confirmed.
The fight was initially scheduled for UFC 303 at the T-Mobile Arena in Paradise, Nevada on Saturday 29th June 2024, but a September date now seems more likely for UFC 306, which will coincide with the UFC's first event held at the Sphere in Las Vegas.
There are no belts on the line for this fight, which will be a 170lbs contest.
McGregor, 35, has not been in action since the summer of 2021 and lost his last two fights.
Conor McGregor is a former UFC champion at both featherweight and lightweight and was the first fighter to hold the title at two different weights simultaneously.
McGregor has won 22 of his 28 professional fights, 19 of them by knockout, and he was Cage Warriors featherweight and lightweight champion before joining UFC in 2013.
He won the interim UFC featherweight title by defeating Chad Mendes in July 2015 and then unified the title with a victory over Jose Aldo the following December.
McGregor defeated Eddie Alvarez in New York to become lightweight champion in November 2016, but lost his last two fights, both against American Dustin Poirier.
In the second of those, McGregor was stopped after he suffered a broken leg and he has not been in the Octagon since that fight in July 2021.
Michael Chandler is a 37-year-old American fighter who was a three-time lightweight champion in Bellator MMA before he joined UFC in 2020.
He has won 23 of his 31 professional fights with 11 of his victories coming via knockout.
Chandler fought for the vacant UFC lightweight championship in May 2021, but lost to Charles Oliviera, while his most recent contest was also against Poirier, who beat him with a third-round submission in New York in November.