Terence Crawford's win over Saul 'Canelo' Alvarez was a career-defining, legacy-cementing, history-making performance, writes BBC Sport's Kal Sajad.

It is a battle for legacy under the bright Las Vegas lights - BBC Sport previews Saturday's super-fight between Saul 'Canelo' Alvarez and Terence Crawford.

Terence Crawford stunned Saul 'Canelo' Alvarez on points in Las Vegas, becoming the first male fighter in the modern era to hold undisputed titles in three weight divisions.