BILOXI, September 12, 2008 (AFP) - Nate Campbell puts his lightweight world titles on the line Saturday, looking for respect when he takes on unbeaten Joan Guzman.

Campbell was a 3-1 underdog when he upset previously unbeaten Juan Diaz on March 8 in Cancun, Mexico. He captured the International Boxing Federation and World Boxing Association belts as well as the lightly regarded World Boxing Organization crown with with a 116-111, 115-112 and 113-114 split decision.

Campbell improved to 32-5-1 with 25 knockouts, but pundits are predicting he won't be able to back up that win.

Campbell, 36, will enter the ring as an underdog against Guzman, who boasts a record of 28-0 with 17 knockouts.

'What's strange about this fight is that I have three belts and I still don't get any respect,' Campbell said. 'All the other guys get the praises and respect, but I'm always the underdog.

'I've come to relish that role because I know what I'm capable of. If you think I'm going to give up my belts to Joan Guzman, you're crazy.'

Guzman, a 32-year-old from the Dominican Republic, is the mandatory challenger courtesy of the WBO. He has already captured titles in the super bantamweight and super featherweight divisions.

Guzman, who knocked out 11 straight opponents in one early span of his career, has won his last seven fights via decision.

'I've been waiting for a fight like this for a long time,' Guzman said. 'Nate is a good, experienced and smart boxer. But I am faster and more hungry than he is. That will be the difference on Saturday night.'

On the undercard, WBC light welterweight champion Timothy Bradley will make his first defence of the title against Edner Cherry.

Bradley, undefeated with 11 of his 22 victories coming by knockout, won the title by split decision over Junior Witter on May 10.

Cherry, who brings a record of 24-5-2 with 12 knockouts, will be moving up in weight.