Oscar Valdez is refusing to write off Italian underdog Carmine Tommasone ahead of their fight in Frisco, .

It would be one of the greatest upsets ever seen on BoxNation if Tommasone took the WBO Featherweight Title from the Mexican.

Valdez is returning after an 11 month lay-off, and although Tommasone has won all of his 19 fights, he has only beaten seven men with winning records.

He has compared Tommasone’s US debut with Manny Pacquiao, who went over to America as an unknown in June 2001 and shocking Lehlo Ledwaba to win the IBF Super-Bantamweight Title.

“I never take no fighter lightly,” promised Valdez. There was a point where no one knew who Manny Pacquiao was when he came to the United States and had his first fight. And he became a star.

“So, we don't know what Tommasone can bring. I will be 100 percent ready for him, or for any fighter. I have the same respect for all fighters inside the ring, and I'm going to do whatever I have to do come out victorious.

“One thing in my mind is to not take him lightly and just try to get the job done and keep on improving my career. I'm definitely focused on this fight and start where I left off.”

Valdez, 28, has been recovering from a broken jaw suffered in his points win against Scott Quigg last March, and there is speculation that victory on Saturday could see him face IBF title-holder Josh Warrington.

While recovering he has also changed trainers and joined the Canelo Alvarez team with Eddy Reynoso calling the shots in his corner.

He added: “It was one of the most difficult times of my life. Having my jaw wired shut for two months was the hardest thing I've ever dealt with.

“That's in the past now. I'm ready to focus on this fight. I'm 100 percent healed from that injury. That's not going to bother me no more.