Floyd Mayweather Senior has launched an attack on British star Amir Khan, saying that he’s “got a glass jaw”.

The man who returned to training his son Mayweather Junior in May 2013 after a 13-year hiatus spoke out against Khan’s punch resistance during a radio interview with On The Ropes.

Mayweather Snr

During that interview, Mayweather Senior also tipped 27-0 reigning WBO World Super-Lightweight Champion Crawford to beat eight-weight world champion Pacquiao in what’s slated to be the Filipino’s final fight.

“I think Crawford can beat Pacquiao. Amir Khan’s got a glass jaw, if you look at him too long, he’s gonna fall down,” Mayweather Senior said.

“We’ll see, but if Pacquiao hits Amir Khan good, Amir Khan’s gone.”

The Bolton ace and former Olympian Khan appears to be on the ever-shortening list for potential spring 2016 Pacquiao opponents, sitting alongside Terence Crawford and Timothy Bradley.

Amir Khan

Mayweather Senior went on to speak about Pacquiao’s retirement, suggesting the puncher-turned-politician would be remembered for chasing Floyd Mayweather to agree a fight with him.

“I’ll look at him like a man that was chasing Floyd for years to fight. A fight that was an easy fight for Floyd,” Mayweather Senior said.

“I told everybody that the fight was easy. I don’t care how long they waited, when the fight took place, Floyd did what he said he was gonna do and I don’t think nobody was wrong in this situation for picking Floyd.”

Whether Khan will face Pacquiao and whether Floyd will return for a shot at going 50-0 remain two interesting storylines to follow into 2016.