Terence Crawford's camp believes his secret weapon poses a unique challenge for Canelo Alvarez. As the two prepare for a high-stakes showdown, Crawford's unorthodox style could prove pivotal.

Terence Crawford has been sent a stern warning by a former opponent ahead of his mega-fight with Canelo Alvarez.

Terence Crawford confronted the victor in the ring, and that brought the announcement he and Álvarez will face off on Sept. 12 in Las Vegas: This battle is a long time coming given Crawford and Canelo's respective places within the sport. Bleacher Report's Lyle Fitzsimmons ranked them as the No. 3 and 6 pound-for-pound boxers in the world.