Fans have called out YouTuber Logan Paul for looking nervous after he arrived at the stadium ahead of his bout with undefeated boxer Floyd Mayweather.
Paul has been talking a big game ahead of his exhibition bout with the retired boxer and weighed-in 16kgs heavier than Mayweather.
But many fans claimed the occasion seemed to over awe him upon his arrival as cameras filmed the YouTuber arriving and heading to his locker room.
Once he got to his locker room, Paul was heard asking: "What is the plan?".
An official then told him to just "relax", but many fans felt the occasion appeared to have got to the inexperienced fighter.
Mayweather slaps down Paul risk
Mayweather has already ruled out any chance of a Paul surprise, despite the YouTuber having a huge weight advantage.
"I've been here before, I know what it takes, I've fought every different style you could possibly fight," Mayweather said.
"Weight don't win fights, fighting wins fights ... at the end of the day and I can fight.
"One thing I can do I can fight. I've been at the top level for 25 years so I know what it takes."
Paul, whose ring record stands at 0-1 after losing an exhibition fight to a fellow YouTube personality, took only one shot at the unbeaten Mayweather (50-0) during a tame weigh-in and even that was a glancing blow that the champ laughed off.
"He's not ready, he don't know what to expect," declared Paul.
"And this is not the biggest fight of my life, this is the biggest fight of his life because he's got a lot on the line, everything to lose. I'm going to have fun."
"The fact I am even up here proves this is a simulation, none of it is real, the aliens are coming in June ... just be ready ... tomorrow I bring the simulation and beat the greatest boxer in the history of planet."
When is Logan Paul v Floyd Mayweather?
The main event bout between Mayweather and Paul expected to start around 12pm (AEST).
Watch 'Mind Games', the new series from Yahoo Sport Australia exploring the often brutal mental toil elite athletes go through in pursuit of greatness:
Click here to sign up to our newsletter for all the latest and breaking stories from Australia and around the world.