Proksa, 29, was put on the canvas in three rounds of a five session stoppage defeat to Golovkin at the Turning Stone in New York back in 2012 and has since struggled to get his career back on track.
The Pole is adamant that if Golovkin came up against pound for pound best Mayweather, 154lber Canelo Alvarez or even super-middleweight champions Carl Froch and Andre Ward, the knockout artist would ultimately prevail.
“From what I have experienced of Golovkin he can beat all of them, I know that,” Proksa exclusively told World Boxing News.
“His victory over Marco Antonio Rubio recently was amazing, and after my fight with Golovkin, I found that I have not yet faced a boxer of his caliber, ever. Witnessing his recent performances also tells me that I was not wrong.”
‘GGG’ boasts just over a 90% KO ratio since the two-round clubbing of Rubio last month and is lined up to meet Martin Murray this February in Monte Carlo. The 32 year-old has never shied away from a meeting with the likes of Mayweather or Ward in the future as the Kazakh states that he can flucuate between 154 and 168lbs.
It remains to be seen whether Golovkin would still be the same force if he went up or down in weight, but Proksa is pleased to be able to say that he once shared the ring with such a talented operator in his career.
“Fighting him was an honor for me. I would like to have more than five weeks to prepare and be fully healthy during the preparations which were lacking before the fight with him, but nevertheless GGG is a great athlete and deserves all the praise he is currently getting,” said Proksa.
Follow on Twitter @PhilDJay for tweets of upcoming news on WBN