Pacquiao-Khan fight off, according to promoter Arum

Manny Pacquiao's retirement tour has hit another bump in the road.

On Tuesday, Pacquiao's promoter Bob Arum told Lance Pugmire of the LA Times that an April 22 bout between his client and English star Amir Khan would no longer be taking place.

Pacquiao recently tweeted that he was in negotiations to face Khan, canceling a previously reported fight with the relatively obscure Jeff Horn.

According to Arum, Pacquiao's hunt for a $38-million purse was a factor in the negotiations falling apart.

"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. "Manny wanted to roll the dice. He rolled the dice and it came up snake eyes.

"If something is too good to be true, it's too good to be true."

Pacquiao is expected to review a new proposal soon for a bout that could take place in July, but Arum would not comment on a potential opponent or location.

The 38-year-old boxing superstar returned to competition after a brief seven-month retirement last November, defeating Jessie Vargas by unanimous decision to capture the WBO welterweight championship.