By Chris LaBate

Marcos "Chino" Maidana, who fought in a twelve round war with Amir Khan last December, says the proposed unification between Khan and WBO/WBC champion Timothy Bradley - is "too close to call."

Bradley vs. Khan is tentative for the date of July 23 in Las Vegas. Khan must first defend his WBA 140-pound title against Paul McCloskey on April 16 at the MEN Arena in Manchester, England.

Maidana is training in Mexico for his upcoming fight with Erik Morales on April 9th at the MGM Grand in Las Vegas. He wants to work his way back to a rematch with Khan. Maidana had Khan in a lot of trouble in the tenth round but couldn't finish him off. He tried to get a rematch with Khan, who doesn't seem interested.

"Of course I'm interested in a rematch with Khan, yet he won't give it to me," Maidana said.