Two of the greatest fighters in UFC history make their Octagon returns after long layoffs when Jon Jones defends the heavyweight championship against two-time former champion Stipe Miocic in the main event of UFC 309.

Stipe Miocic will challenge Jon Jones for the heavyweight championship at UFC 309 this Saturday in New York. Here's what you need to know.

Former UFC title challengers Chael Sonnen and Anthony Smith, as well as retired lightweight contender Paul Felder will serve as a desk analysts on the UFC 309 post-fight show and throughout the card, when necessary. Brendan Fitzgerald will serve as the host.