By Chris LaBate

In his first bout since the one-sided decision loss to IBF lightweight champion Miguel Vazquez in March, Leonardo "Lenny Z" Zappavigna (25-1, 17KOs) will face Panamanian veteran Ameth Diaz (29-10, 20KOs) on August 5th at the Melbourne Pavilion in Victoria, Australia. Diaz, a dangerous veteran with power in his fists, has won a few key fights but he's never been able to win any of his important outings with boxers like Joan Guzman, Ji Hoon Kim and Takehiro Shimada.