Canelo Alvarez has had to take extreme measures to prepare for the huge challenge of Terence Crawford.Crawford has put on 14lbs and is stepping up to super-middleweight to challenge fellow pound-for-pound ranked Alvarez for his undisputed titles in Las Vegas on Saturday night.Canelo is wary of Crawford’s tricky and rare style, and has reached out to top talents for helpThe American is an elite operator who has yet to be beaten in his 42-fight professional career, who is extremely gifted technically.‘Bud’ possesses rapid hand speed, and world class ringcraft and IQ which has seen him dismantle all of the leading names that have stood in his path to greatness.Many have debated exactly what threats that Crawford will pose to the naturally bigger Mexican, who is a marginal favourite to retain his crown.But one of those imminent dangers that the challenger will pose in their Netflix blockbuster, is his ability to switch from the orthodox to southpaw stance.Crawford is what is known in boxing as a gifted switch-hitter, and often changes his stance during the fight to lead with either his left hand or right hand.It allows him to confuse opponents and makes him a real challenging puzzle to unlock in a fight, hence why no opponent has been able to defeat him.How has Canelo Alvarez prepared for Terence Crawford’s style?During the ‘Netflix Countdown to Canelo vs Crawford series’, boxing podcaster Akin Reyes remarked: “You can’t train for that. You can spar right handers, you can spar left handers.“But you can’t spar someone who can do both within the same round.”Well in fact Alvarez has worked with coach Eddy Reynoso to address Crawford’s random switch hitting, during an intense training regime.And to replicate the elite switcher, the undisputed king has drafted in the help of another switch-hitter in Feliciano Hernandez.Hernandez has impressed Canelo so far in his career and earned the call-up to replicate CrawfordGettyThe Cuban has a perfect 8-0 record and is emerging as a leading world title contender at 168lbs.In footage from the session Hernandez can be shown using both stances to test the skills of Alvarez to adapt and react to changes of stance.And Alvarez had huge words of praise for his training ally, adding: “He is perfect for my preparation it is way better.“We need to spar with both styles, and Feliciano can do both.“I’m working to prepare for it, and I have experience to face every style.“Feliciano is one of the best at 160lbs, he is a very good fighter and the next champion for sure.”Canelo is the marginal favourite to beat Crawford despite the intriguing puzzle given his experience at 168lbsMeg Oliphant/MatchroomCanelo Alvarez and Terence Crawford’s training campsIt has marked a busy period for Alvarez who has left no stone unturned with Reynoso.He has even sparred undefeated former world champion Jaron Ennis, who has often been compared stylistically to Crawford.Ennis has history with Crawford and was happy to help, handing the champion a real advantage to prepare.‘Bud’ has had his own competitive training rounds, including training alongside three-weight world champion Shakur Stevenson.Steven Nelson has also been drafted in to test Crawford, who is preparing for different factors entirely.The American has been forced to confront larger and more powerful operators to prepare for the jump up in weight to tussle with the power-punching Alvarez.Canelo and Crawford can barely be separated – but the latter is yet to be beaten as a pro