Golden Boy Promotions CEO Oscar De La Hoya says he's got big plans for WBA/WBC middleweight champion Canelo Alvarez.

Canelo is only days away from his upcoming contest with Rocky Fielding this weekend, and De La Hoya tells TMZ Sports a 3rd fight with Gennady Golovkin will definitely happen.

Oscar confirmed that Golden Boy Promotions has locked up T-Mobile Arena in Vegas for Canelo to fight on May 4 -- but said he's not ready to announce the opponent.

Canelo fought Golovkin to a controversial rematch back in September 2017. They met a year later, with Canelo winning a very close twelve round majority decision.

When we asked if he was gunning for Golovkin, Oscar downplayed it.

"I haven't even spoken to GGG, I haven't even spoken to his handlers. I have that date for Canelo and that's it," Oscar said.

But, he did assure us a 3rd fight is coming -- whenever Canelo feels like it.

"Is he gonna fight GGG again? Yeah, whenever we say he's gonna fight him again. We call the shots now. Canelo beat him so if he's gonna fight him it's gonna be when we say."

Oscar said there are other fighters in the mix for Canelo as well -- including Daniel Jacobs, Billy Joe Saunders and the Charlo brothers.

"They're all gonna get it," Oscar says ... "Canelo fights the best."

First up is Fielding at Madison Square Garden in New York CIty -- and Oscar says he expects nothing short of a knockout.

The contest will mark the first bout for Canelo at the full super middleweight limit of 168-pounds, as the Mexican superstar attempts to capture the WBA "regular" world title. Callum Smith, who knocked out Fielding in one round, is the recognized WBA champion at the weight. Fielding has won six fights since.