Deontay Wilder defends his WBC world heavyweight title on Saturday night against Luis Ortiz, in a rematch from their fight last year.
In March 2018 Ortiz worried Wilder before the American finally stopped his title challenger and this weekend the pair will do it all again.
The Bronze Bomber has made two title defences since their first outing and Cuban Ortiz is unbeaten in his last three fights since being stopped by the heavyweight champ.
It's expected to be a big night of boxing, and you can watch it LIVE on Saturday night.
What time does the fight start?
The action takes place at the MGM Grand is Las Vegas and ring walks are expected at 5am Sunday morning UK time.
Sky Sports Action will start their coverage of the night at 2am, with action from the exciting undercard on before the main event kicks off.
Who is on the undercard?
Leo Santa Cruz, who had two great fights with Carl Frampton, will face Miguel Flores in the semi-main event for the vacant WBA (Super) super featherweight title, after Santa Cruz vacated the featherweight title earlier in the year.
Undefeated WBA (Regular) super bantamweight champion Brandon Figueroa defends his title against Julio Ceja, whose last outing saw him miss out on becoming lineal champion against Guillermo Rigondeaux.
Elsewhere Luis Nery takes on Emmanuel Rodriguez, Leduan Barthelemy fights Eduardo Ramirez and Vito Mielnicki Jr. and Marklin Bailey go at it.
It's expected to be a brilliant night of boxing.
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