"Not, not at all," Yoo said Friday while waiting for the arrival of his superstar foe for a press conference at the KINTEX in the neighboring city of Goyang.

"This is a real fight," Yoo said, stressing that his aim is to score an upset with the help of his movement and "zero-inch punch," a blow similar to the mythical punch unleashed by Bruce Lee.

"My focus is on my movement so I can land that punch," Yoo said.

A practitioner of several disciplines like taekwondo, wushu, judo, boxing and a form of martial arts taught in the Russian military, Yoo even spent three days training at the Wild Card Boxing Club in Hollywood.

When he went back here, Yoo even got in touch with two-division world champion from Korea Hwan Soo Hong for some advice.

"He (Hong) taught me how to move," he said.

Pacquiao says he did enough in training camp to diffuse whatever Yoo will attempt to bring to the fight.

"I am ready and we did a lot during training though not really heavy but it will be enough for this exhibition fight."

Since he is meeting an MMA fighter, Pacquiao only has one thing to say.

"As long as he doesn't kick, I will be okay," he said as the crowd laughed.

It's showtime in Seoul.