In a stunning development, Canelo Alvarez changed course on a potential Jake Paul bout and signed a four-fight deal with Riyadh Season, salvaging the Terence Crawford mega fight in September, sources told ESPN.

Jake Paul, one of the world's most popular boxers, and Canelo Alvarez, one of the world's most accomplished boxers, reportedly are set to square off in the ring.

Saul "Canelo" Alvarez vs. Terence Crawford is back on for September — and Jake Paul has been left out in the cold after a chaotic few days in the boxing world.