Gennady Golovkin (37-0, 33KOs) is not ready to give up his dream of unifying the entire middleweight division.

On September 16th, Golovkin will take part in the biggest fight of his entire career, when he defends his IBF, IBO, WBC, WBA world titles against Mexican superstar Saul "Canelo" Alvarez (49-1-1, 34 KOs) at the T-Mobile Arena in Las Vegas.

The contest will be the first appearance of Golovkin in Las Vegas and his third bout as a headliner on HBO Pay-Per-View.

A win over Canelo would be the biggest achievement of Golovkin's career. It would help him crossover from simply being a star to becoming a mega-star in the sport.

As far as the next move beyond the September fight, Canelo does have the option of an immediate rematch clause. So Golovkin could be forced to face Canelo for a second time. But if Canelo loses and decides to go in another direction, then Golovkin will attempt to capture the remaining title outside of his grasp - which is the WBO belt currently held by Billy Joe Saunders, who makes a mandatory defense next month against Avtandil Khurtsidze.

"I think we have two options [after this fight]. The first option is a rematch. And the second option - I want all belts. I want all belts in the middleweight division, it's my dream," Golovkin told TMZ.

Golovkin's trainer, Abel Sanchez, recently stated that his boxer could also entertain the option of taking a big fight at super middleweight.

For several years Golovkin was chasing a "dream" fight with Floyd Mayweather Jr., who retired from the sport in September 2015. Golovkin was even willing to squeeze down to 154-pounds to make that fight.

Well, GGG has finally come down to reality and realizes that fight will never happen.

"Never, never [will happen]. He's not afraid, but I just think it's never. It's impossible," Golovkin said.