It was revealed last year that Du Plessis' coach Morne Visser uses the Taser-like tool on the fighters he trains as punishment for mistakes they make in the gym. It is an unorthodox and controversial training method - and potentially very dangerous - but Du Plessis credits it with helping him become a UFC champion.

UFC 319 is set to take over Chicago this weekend as the United Center plays host to a highly anticipated main event between two undefeated UFC fighters. Middleweight champion Dricus Du Plessis will defend his crown against Khamzat Chimaev in a clash of styles that has fans buzzing.

We look at the betting odds for the full UFC 319 fight card, including the main event of Du Plessis vs. Chimaev and co-main event Murphy vs. Pico.