Former world champion Amir Khan (33-4, 20 KOs) is looking to eradicate what he feels is a false belief - that he can't take a good punch.

Earlier this month, Khan won a much tougher than anticipated twelve round unanimous decision over Samuel Vargas in Birmingham.

In a fight that many felt would be over in a few rounds, Khan was dropped in the second round and later wobbled in the tenth.

Khan has gone through five trainers, and all of them have tried to polish his defense skills - Oliver Harrison, Jorge Rubio, Freddie Roach, Virgil Hunter and now Joe Goossen.

The knockdown with Vargas, was one of several in Khan's career.

Three of his four defeats were by knockout - with vicious endings to his contests with Saul "Canelo" Alvarez, Danny Garcia and Briedis Prescott.

And he's also tasted the canvas in several other fights.

"People think I can't take a shot," Khan told Sky Sports.

"[When I got dropped by Vargas], the first thing that went through my mind was: 'oh my, people will be saying that Amir got knocked down again.' I wasn't hurt and got up straight away. If I was hurt, I would have taken my time in getting up. I lose focus. That's just something in me."

Because of what happened with Vargas, and in several other contests, many believe the boxer is chinny.

"No [I'm not chinny], not at all," Khan said.

"I've been doing this game for so long. I know that I'm skilful and I'm better than opponents, technically.

"Sometimes I lose respect and get caught. Then I have to switch on. I think that's what happens. I take it for granted. I think 'I'm fine' then take my eye off the game. That's just me. I tried to change it, but I don't think that I can."