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

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.

As Gervonta Davis prepares to fight Lamont Roach, he keeps talking about stepping away from the sport that made him wealthy and famous.