UFC runs a contender for card-of-the-year each November at Madison Square Garden where the main event bouts often stand as a referendum on the company's endless debate: Who’s the “Greatest of All-Time” in UFC?

One of the greatest fighters in MMA history returns on Saturday night as Jon Jones defends his heavyweight championship against two-time former champion Stipe Miocic in the main event of UFC 309. Jones is making the first defense of the title he won with a first-round submission of Cyril Gane at UFC 285 in March of 2023.

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.