JAIME MUNGUIA reckons that Gary "Spike" O'Sullivan will be a big test in the Lone Star State.
The Mexican battler is moving up to middleweight for the first time to meet the Corkman over 12 rounds in San Antonio, Texas on Saturday night.
Paschal Collins and Conal Thomas will be working O'Sullivan's corner with Mexican ring legend Erik "El Terrible" Morales, a former multiple weight World titlist, calling the shots on the opposing stool.
Twenty-three-year-old Munguia is 12 years O'Sullivan's junior and acknowledged that the Leesider has plenty of top-level experience.
"Gary O'Sullivan comes with a strong desire to win and a strong mentality which will make for a tough fight. He's a high-level fighter with a lot of experience, he said.
"Fighting against him in my first fight at middleweight is an excellent opportunity. So we have to be careful. He's a fighter that goes forward and throws punches very fast."
The unbeaten Tijuana puncher defended his WBO super welter belt five times before moving up a limit and is wary of O'Sullivan's right hooks.
"He's very strong and has a strong right hand. He'll explode with fast combinations, so we have to make sure we're aware of that with my guard up," he added.
O'Sullivan and Collins arrived in Texas from Boston on Tuesday ahead of the weekend's weigh-ins on the Golden Boy promotion.
Collins is confident that his man can cause an upset and reckons that Kildare's Dennis Hogan, who was on the wrong end of a controversial majority decision to Munguia last year, punched huge holes in the Mexican's aura of invincibility.
"What it (Hogan fight) did do was it showed some flaws in Jaime Munguia. He's a young fighter. For a guy his age to have so many fights, it's mind-boggling," said the Dubliner.
The knockout percentages of both men suggest that Saturday's non-title showdown won't go the distance.
Munguia has won all 34 of his outings, 27 by way of KO, a 79% ratio, and has 132 rounds of prizefighting under his belt since making his pro debut in 2013.
O'Sullivan has racked up 30 wins from 33 fights, 21 by way of KO, a 63% ratio. The Mahon orthodox has fought 142 rounds since his introduction to the paid ranks at the Neptune Stadium in 2008.