Breaking Down UFC 258: Usman vs. Burns & Barber vs. Grasso

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UFC 258 is headlined by Kamaru Usman defending the welterweight title against former teammate Gilbert Burns, and a co-main event of Maycee Barber against Alexa Grasso. Barber is looking to shake off her only loss but Grasso is such a tough bounce back fight. In the main event Usman is defending his belt against Burns. Will we see another successful title defense for the champ? Sports Illustrated's Kaitlin O'Toole is joined by SI's Justin Barrasso for insight.