Two notable fights scheduled to take place on the undercard of the Amir Khan-Zab Judah junior welterweight unification bout at Mandalay Bay in Las Vegas have been called off -- both for the second time.

• The junior welterweight title eliminator between Lamont Peterson (28-1-1, 14 KOs) and Victor Cayo (26-1, 18 KOs) fell off the card because of issues between promoters Golden Boy and Warriors Boxing over the option agreement between them in the event Cayo won.

• The welterweight fight between Joel "Love Child" Julio (37-4, 31 KOs) and Antwone Smith (20-2-1, 12 KOs) was canceled because Julio had a family emergency, causing him to leave his Miami training camp last weekend for an extended period.

The Peterson-Cayo fight, which will determine a mandatory challenger for the winner of the Khan-Judah bout, will now head to an IBF purse bid on July 5, Warriors Boxing promoter Leon Margules told ESPN.com on Wednesday.