LOS ANGELES - A welterweight title bout between WBO champion and Philippine boxing icon Manny Pacquiao and Britain's Amir Khan has collapsed, The Los Angeles Times reported on Tuesday.

Pacquiao's long-time promoter Bob Arum told the newspaper the proposed $38 million bout scheduled for the United Arab Emirates in April had proven to be "pie in the sky".

"When they contacted me, I told them it was pie in the sky, that this is crazy, it's not going to happen," Arum said.