By Mark Vester

According to The Sun, WBA junior welterweight champion Amir Khan has offered former champion Joel Casamayor a sum of £400,000 to fight him at London's O2 on July 31. Golden Boy Promotions plans to package the fight with the Juan Manuel Marquez-Juan Diaz HBO pay-per-view, which airs the same day.

Khan's first choice, Marcos Maidana, is dealing with a back injury. Michael Katsidis was also considered but he comes at a much higher price than Casamayor.

"It's about getting the timing right. I'll fight anyone but a lot of guys are busy," Khan told the paper.

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