Katsidis out of August FNF fight

Veteran lightweight brawler Michael Katsidis hurt his knee Saturday and has withdrawn from a fight with prospect Darley Perez. They were due to meet Aug. 10 at the Morongo Casino Resort & Spa in Cabazon, Calif., in the main event of ESPN2/ESPN3's "Friday Night Fights."

According to the email that Justin Fortune, Katsidis' trainer, sent to promoter Gary Shaw, Katsidis saw a doctor and was diagnosed with "septic bursitis" in his knee and was advised to stay off of it for three weeks.

John Beninati, Shaw's matchmaker, told ESPN.com that he is looking for a new opponent to face Perez.

"I'll look for somebody who is acceptable to ESPN and try to keep Darley in the main event or, if we can't, we'll look to make a new main event," he said.

Australia's Katsidis (28-6, 23 KOs), 31, has been a fan favorite for years because of his all-action style, although it's catching up to him. The former interim titlist has lost four of his past five fights, including a decision to Albert Mensah on April 13 on FNF.

Perez (25-0, 19 KOs), 28, of Colombia, is a big hitter, but completely untested. Katsidis would have been his most notable opponent by far.