GARY "SPIKE" O'SULLIVAN has pledged to go to war against Mexico's Jaime Munguia in Texas on Saturday night.
The Cork middleweight meets the Tijuana native over twelve rounds, but doesn't think the fight will go the distance at the Alamodome in San Antonio.
"I feel great at middleweight and even stronger at this weight," said the Mahon orthodox, who dropped down to light-middle following his defeat to David Lemieux in Las Vegas in 2018 but has now moved back up six pounds.
"I'll be working at both weights to get the best fights out there. I'm not being brought here to win, you know, stressed the Corkman.
"I'm in his backyard, and he's a superstar over here. He's bringing in millions of dollars for Golden Boy Promotions.
But I'm not reading the script. I don't believe I'll get a points decision so I'll be looking for a knockout.
"He should be under no illusion. I've prepared very hard for this fight. I've made a lot of sacrifices. Don't miss this fight because it's going to be a war."
Undefeated Munguia, speaking through an interpreter, is by no means underestimating O'Sullivan ahead of his debut at 160lbs and his 35th pro fight.
"I've come with motivation. It's something new for me. It's a new (weight) division with a lot of great fighters such as Gary O'Sullivan," said the former WBO super welter champion.
O'Sullivan, who has won 30 of his 33 outings so far, believes that moving up a limit could suit Munguia, who controversially beat Kildare's Dennis Hogan last April.
"I think that will potentially work against me because he is a bigger man. I can make 154lbs (light middle) easily, but he struggled to make 154. Myself and Dennis (Hogan) are different fighters.
"He's more of a boxer and I'm more of a knock out artist. He's there to be hit and I hit harder than Dennis."
Saturday's showdown will be streamed live on DAZN (USA).
Both men will be in the ring at approximately 4 am (Irish time) on Sunday morning.