Boxing legend Evander Holyfield wants everyone to PUMP THE BRAKES on calling Tyson Fury the G.O.A.T. ... telling TMZ Sports the dude has a lot more to prove before getting that title.
The Gypsy King has entered the debate after dominating Deontay Wilder last month ... with some folks saying it's time to consider Fury as one of the best heavyweights of all time.
We spoke with The Real Deal -- who's on everyone's list of best heavyweights ever -- about Fury getting consideration for the G.