Even in a city known for staging some of boxing’s greatest fights, the Canelo Alvarez-Terence Crawford match stands nearly alone.It will be the first fight at 5-year-old Allegiant Stadium, the Saturday night showdown underscoring the magnitude of an event that will have implications for both boxers trying to further strengthen their Hall of Fame-worthy careers.Recommended Stories list of 4 itemsend of listAlvarez (63-2-2, 39 knockouts), as is typically the case when the Mexican great fights in his boxing home of Las Vegas, will have the vast majority of the crowd behind him as he defends his unified super middleweight championship. The 35-year-old is a -175 favourite at BetMGM Sportsbook.“This fight for me is big,” Alvarez said. “It’s one of the biggest fights of my career for sure.”Crawford (41-0, 31 KOs) is moving up two weight classes, and the 37-year-old from Omaha, Nebraska, already has captured two unified division titles. No male fighter has accomplished that feat in three classes.“This is a massive fight,” Crawford said. “It’s talked about all over the world right now.”Alvarez and Crawford talk of the town in Las VegasThe city known as the “Fight Capital of the World” is used to hosting big-time matches, but there was no stadium like Allegiant to house some of the great bouts of the past.Resorts such as Caesars Palace’s outdoor arena, The Mirage and Las Vegas Hilton hosted some of the more notable fights in 1980s and 1990s, before giving way to MGM Grand Garden Arena and then T-Mobile Arena.Top Rank matchmaker Bruce Trampler, who was i …