Gervonta Davis said it would be his last year as a boxer. If that is true -- and boxers often speak of retirements that never come to fruition -- one of the biggest stars in boxing is kicking off his final campaign with an intriguing matchup on Saturday when he defends his WBA lightweight championship against Lamont Roach Jr.

Here’s what you need to know to watch the boxing showdown between Gervonta Davis and Lamont Roach in Brooklyn.

Gervonta "Tank" Davis is a massive favorite to knock out Lamont Roach, but can the WBA super featherweight champ pull off the upset of the year?