Amir Khan has vowed to continue taking risks as he seeks to add Zab Judah's IBF world light-welterweight title to his WBA belt.
The rivals, who both hit the 140lbs weight limit at yesterday's weigh in, clash at the Mandalay Bay Events Centre in the early hours of Sunday morning.
It is a significant test for Khan against a wily and dangerous opponent who remains capable of causing an upset even if his best days are behind him.
But the 24-year-old from Bolton will nonetheless go on the offensive in an attempt to please the crowd.
"The guys I'm fighting are tough and are big names. I'm not one to run and make a fight look bad," said Khan.
"I still get involved if I can. I like a tear-up when people think I might take it easy.
"My trainer Freddie Roach has got me to calm down just a little bit because I get a little bit impatient waiting. I jump in and that's when you make mistakes.
"Sometimes it's risky the way I fight, but that's what makes me special. People want to watch me because they know I take risks."
Judah, 33, has mixed it with the best of his era having fought Floyd Mayweather, Miguel Cotto and Kostya Tszyu, though he lost against all three among six defeats in 49 contests.
"When Judah fought Kostya he had a lot of heart, he used to get involved more," said Khan.
"Now he's trickier, he's very experienced and knows what to do and what not to do in a fight.
"He's been in some big, big fights and is very hard to knock out. He knows the ring inside out.
"He still has the speed, still has the power and knows how to use them. Experience has made him trickier now."
Judah has accumulated more knock outs (28) than Khan has victories (25) and believes the Olympic silver medalist may be underestimating the value of his experience.
"Forget this stuff about me being an old fighter," he said.
"I turned professional at 18, I was a world champion at 20 years old, but look at what's out there.
"The best fighters around are Sergio Martinez, Floyd Mayweather, who are both older than me, and Bernard Hopkins, who's still a world champion at 46.
"I got my second wind. I used to be a tough guy, a bully, but that doesn't pay.
"I grew up in a tough environment I became a product of Brownsville, Brooklyn.
"But I'll give you the best Zab Judah in this fight. Beware of experience, Amir Khan."