By Miguel Rivera

Former undisputed heavyweight champion James 'Buster' Douglas paid a visit to Mexico City to take part in a media event with the World Boxing Council and their organization president Mauricio Sulaiman.

Douglas believes there are currently some very good fighters in the heavyweight division, but he's very disappointed with the high percentage of fighters who are testing positive for banned substances in boxing's biggest division.

During the last few years - Luis Ortiz, Alexander Povetkin, Shannon Briggs, Dillian Whyte, Tyson Fury, Hughie Fury, Lucas Browne, Bermane Stiverne, Tony Thompson, Erkan Teper, Mariusz Wach and several other heavyweights have come up positive for banned substances.

Back in his era, Douglas feels there was far less illegal substance use - especially when it came to performance enhancing drugs.

"There are good champions now, unfortunately all of this [PED use] has come out. Before, it was more natural, they didn't need any supplements other than hard work. Hard work was the only thing you needed," Douglas told ESPN Deportes.

Next year, one of the biggest fights in the heavyweight division may come together - with heavyweight champions Deontay Wilder and Anthony Joshua colliding in the ring.

In order for that to happen, Joshua (19-0, 19 KOs) needs to retain his IBO, WBA, IBF titles when he meets Carlos Takam on Oct. 28. And Deontay Wilder (38-0, 37 KOs) needs to do the same when he defends his WBC title in a rematch with Bermane Stiverne on November 4.

"Next year we will see a great fight between two of the best athletic fighters. It will be a very interesting fight to see and we will find out who's going to be the best. I like both (Wilder and Joshua), but I have to say that I'm going with Wilder (to win) because he's from the United States," added Douglas, who in 1990 shocked the entire boxing world when he became the first man to defeat Mike Tyson.