By Miguel Rivera

WBO welterweight champion Jessie Vargas (27-1, 10KOs) will be coming in with a furious mentality if the fight gets finalized with  IBF champion Kell Brook (36-0, 25KOs).

The fight is being negotiated for the fall, but Vargas - who already signed the contract for the fight - is having his doubts about the contest, because Brook has continued to stall on finalizing the terms on his end.

BoxingScene.com had a report two weeks ago where Brook's trainer, Dominic Ingle, said his fighter was unhappy with the money being presented and the amount of money guaranteed to Vargas to travel over to Sheffield [reportedly getting $1.7 million].

Brook's promoter, Eddie Hearn of Matchroom, is trying to work out the terms with his fighter.

Vargas suffered his first career defeat last January, with a controversial twelfth and final round. After losing the majority of the fight, Vargas hurt Timothy Bradley badly in the closing moments of the final round and was trying to finish him off when the referee accidentally jumped in and stopped the fight about 10 seconds early. The referee mistakenly thought he heard the final bell.  

Because of that outcome, Vargas admits he's now a far more aggressive fighter and wants to go for the knockout in every fight - especially if he travels over to Brook's backyard. Vargas captured the title in March when he knocked out previously undefeated Saddam Ali.

"I'm pressing for the knockout. That's been my mentality since the Bradley fight and I'm going to continue with that. I'm a different fighter, a more aggressive fighter, and I want to knock him out," stated Vargas to ESPN Deportes. "When I go in there, he has certain advantages but I still hope that the judges respect the sport."

"[Brook is] a good fighter, he is not very busy,  very consistent, mid-range puncher. He's a good fighter, he likes to counter and my coach has a plan. He studied him well. We are going to show I'm the best fighter, that's my advantage, I'm better. What motivates me a lot about this fight is that the winner is the best at 147 pounds, so I have that craving to win the fight. Now that Floyd Mayweather and Manny Pacquiao retired, having two titles would make me the best in the world [at 147] and that is a great responsibility."