Keith Thurman has offered to take Canelo Alvarez’s place in fighting Terence Crawford, should he pull out.Canelo is set to defend his undisputed super middleweight belts against undefeated ‘Bud’ in Las Vegas on September 13. Canelo and Crawford’s super-fight will headline the Vegas event@danawhite - InstagramCrawford, the reigning WBA super-welterweight title holder, is moving up two weight classes in order to face the Mexican icon.With both men two of the finest boxers of their generation, fans could be in store for a fight of the century contender.The event, part of Riyadh season and in partnership with Dana White and Sela, is one that most boxers are trying to be a part of. That includes former two-time world welterweight champion, Keith Thurman, who revealed that he has contacted Crawford to say that he is available to step in should Canelo pull out.Thurman returned to the ring in March, following a three-year hiatus to beat Brock Jarvis in the third round by way of knockout. When speaking to MillCity Boxing, Thurman said: “He [doesn’t] really need to see me but I told Bud, I DM’d him actually recently.“I said ‘Hey man, if Canelo pulls out, I’m here.“If anything happens to Canelo, Bud, I’m here just let me know’.”Crawford responded with a laugh, saying: “We good pimp, we good, we got this.'”Turki Alalshikh recently announced his extensive plans for the undercard, with Thurman potentially having a chance of being a part of Canelo vs Crawford after all.Thurman’s only career loss came in July 2019 against Manny PacquiaoGetty Images - GettyAs two of the pound-for-pound greats are gearing up to fight, the main event is anticipated to be the most-viewed boxing event of all time.It’s no surprise that the undercard of the fight is such an appealing prospect to boxers, especially with it being the potential final fight for Crawford. If September 13 is the final fight of Crawford’s illustrious career, he’ll certainly be hoping to face Canelo as planned.‘Bud’ currently boasts a perfect professional record of 41-0, with 19 consecutive world-title bouts.Assuming he doesn’t retire, a win against Canelo could see Crawford going down the path to becoming the first male three-weight undisputed champion.Canelo’s professional record currently stands at 63-2-2.White had to step in when things got physical between Canelo and CrawfordGettyThe 35-year-old’s opponent has been fighting for 20 years, with 27 of the Mexican’s bouts being world-title fights.Both men are accomplished four-division champions, but only one will emerge the winner of this bout.