By Edward Chaykovsky

Former world champion Amir Khan (31-4, 19KOs) believes Top Rank's CEO Bob Arum is bitter because he's not affiliated with his promotional banner, and that is part of the reason - according to Khan - that a fight with Manny Pacquiao has not come off.

Pacquiao vs. Khan was in talks last year, but then a fight was finalized between the Filipino superstar and Floyd Mayweather Jr. There was also discussions earlier this year, and Khan was passed over in favor of Timothy Bradley.

Now Pacquiao is slated to return on November 5th at the Thomas & Mack Center in Las Vegas, and he needs a dance partner.

Khan, who once trained side by side with Pacquiao and sparred with him on numerous occasions, was knocked out in six rounds when he moved up to 155-pounds to face Saul 'Canelo' Alvarez in May.

Arum recently lashed out at Khan, stating to media that the Bolton fighter is overpricing his worth.

"Khan doesn't have the greatest chin and he makes mistakes - and he's not a top fighter. The truth is - he's not. He makes believe that he won the gold medal in the Olympics but he only won the silver," Arum told BoxingScene.com.

Khan brushed the comments aside and says Arum is just scared to make the fight.

“There are talks about Manny but Bob Arum doesn’t want to make that fight," Khan told Sport360.

"It seems to me, he knows what would happen in that fight. It’s a big fight which fans would want to see but I think he is looking for every excuse not to make it. I think he’s scared and it’s also because I’m not with Bob Arum, I’m with a different team, I’m with Al Haymon. I think Bob’s always been bitter against me, he’s always had the bitterness against me."