After Saul Alvarez is forced to pull out of their fight due to a drug suspension, GGG puts his titles on the line
GENNADY GOLOVKIN defends his WBA and WBC middleweight titles against late replacement Vanes Martirosyan on Saturday night.
After Saul Alvarez's shock drug rap, GGG returns to the ring for the first time since his draw with the Mexican last September.
Martiosyan, known as 'Nightmare', has failed in both his world title bouts so far and hasn't fought for two years.
Golovkin's IBF title will not be on the line as the sanctioning body didn't approve the Armenian-American as an opponent.
UNFORTUNATELY this fight isn't being shown live in the UK.
In the US, HBO will be covering all the action.
You can stay here on SunSport though for analysis and reaction from ring-side with the fight taking place in the early hours of Sunday, May 6.
IF you're staying up to follow this one, get the coffee ready.
The undercard will begin around midnight UK time and the main bout is expected around 3/4am.