It's being dubbed the Battle for Los Angeles. It's also one of Showtime's biggest matchups of the year. When featherweight champion Leo Santa Cruz meets up with Abner Mares in a rematch from 2015, nothing short of fireworks can be expected.

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Santa Cruz (34-1, 19 KOs) and Mares (31-2, 15 KOs) put on quite a show in their all-action thriller in 2015, and even though Santa Cruz emerged victorious, plenty of questions still remain heading into this rematch. 

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In the time since that first fight, Santa Cruz actually lost the title to Carl Frampton in July 2016, only to regain it back in January 2017. Mares has gone 2-0 since losing out on the title to Santa Cruz, hoping a third-consecutive win will redeem him of that 2015 loss and crown him a champion once again.

This card also marks the return of junior middleweight champion Jermell Charlo as he gets a shot at a foe his brother, Jermall, dispatched of in Austin Trout.

The two-fight card will begin at 10 p.m. ET on June 9 live on Showtime from Staples Center in Los Angeles. Below is a look at the official card set for this edition of Premier Boxing Champions on Showtime. 

Fight Weight Class

Leo Santa Cruz (c) -500 vs. Abner Mares +350

WBA super featherweight title (12 rounds)

Jermell Charlo (c) -950 vs. Austin Trout +575

WBC junior middleweight title (12 rounds)

Karlos Balderas vs. Pedro LopezSuper featherweight (6 rounds)
Ivan Redkach vs. Brian JonesWelterweight (10 rounds)