Gennady Golovkin promoter Tom Loeffler has declared his possibly unpopular opinion that GGG v Saul 'Canelo' Alvarez is by far the bigger match-up in the sport of boxing at the moment.This is even ahead of the blockbuster heavyweight fight of Anthony Joshua vs Deontay Wilder, which is still without a date.Golovkin (38-0-1, 34 KOs), boxing's longest-reigning world champion, will be defending his world middleweight championship crown for the 21st consecutive and record-breaking time on September 15 against former two-division world champion Alvarez (49-1-2, 34 KOs) of Guadalajara, Mexico, in a rematch of their spectacularly controversial fight which took place in September of 2017.When asked on SiriusXM Boxing on Twitter about which match-up he sees as being the bigger fight at the moment, Loeffler responded with: "Well I believe the bigger fight is the one that's actually happening."Loeffler is pointing to the fact that the Joshua vs Wilder fight has been basically speculation for a very long time, while GGG v Canelo has a set date and time to get excited for.The boxing promoter did not stop there, however, he went on to talk up the fanbases of both GGG and Canelo, claiming that they might not be heavyweight champs, but they still generate a decent bit of fan fair.Elaborating on this, Loeffler said: "When you look at the fanbase that Canelo brings to the table, he's a proven pay-per-view star, sells out a lot of tickets."GGG brings his fanbase, he's sold out Madison Square Garden, he's sold out the O2 Arena in London, he's sold out the StubHub in LA, the T-Mobile in LA and Las Vegas.

"So when you put those two fanbases together, I'd have to go with GGG and Canelo [as the bigger fight]."

Loeffler does point out that heavyweight fighters typically generate more fan fare for pay-per-view events, but does not believe that it will take anything away from the heavyweight duo's level of entertainment that they will bring to the table come fight night.

When it becomes time for the Joshua vs Wilder fight to move closer in confirming the ongoing talks, it remains to be seen which fight will be bigger, but until that fight has a confirmed date, it will remain that GGG v Canelo is the sport's biggest showcase at the moment.