Photos: Jermall Charlo, Jorge Sebastian Heiland - Go Face To Face

Four-division world champion Adrien Broner and three-division world champion Mikey Garcia went face-to-face Thursday at the final press conference two days before they headline a Premier Boxing Champions event Saturday, July 29 live on SHOWTIME from Barclays Center, the home of BROOKLYN BOXING®.

SHOWTIME CHAMPIONSHIP BOXING begins at 9 p.m. ET/6 p.m. PT with unbeaten former world champion Jermall Charlo meeting top contender Jorge Sebastian Heiland in a middleweight world title eliminator.

Undercard action on "SHOWTIME CHAMPIONSHIP BOXING Prelims" will stream live on Facebook and YouTube and will feature heavyweight contenders Gerald Washington and Jarrell Miller in a 10-round match, plus Irish sensation Katie Taylor in her U.S. debut.

Tickets to the event, which is promoted by Mayweather Promotions and DiBella Entertainment, start at $50 (not including applicable fees), are on sale now, and can be purchased at ticketmaster.com, barclayscenter.com or by calling 800-745-3000. Tickets can also be purchased at the American Express Box Office at Barclays Center. Group discounts are available by calling 844-BKLYN-GP.

LOU DIBELLA, President of DiBella Entertainment

"A month from now there will be a huge event in Las Vegas, but two days from now there is the best fight card of the summer, the best fight of the summer, and a great show from top to bottom at Barclays Center in Brooklyn.

"This is a great summer of boxing for SHOWTIME and it's great to be in this room and see all the great attention that this fight card is getting. This is one of the best representations that we can have of our sport. This is one of the most stacked cards I've ever been involved with.

"There are a lot of good reasons to get a ticket and come to Barclays Center on Saturday night. There will be a strong Irish presence on the card Saturday with both Katie Taylor and Noel Murphy entering the ring."

LEONARD ELLERBE, CEO of Mayweather Promotions

"This is definitely a must-see event on Saturday night. Two great fighters, fighting at the right time, both in the prime of their careers. It's going to be a great show.

"One of the main reasons why boxing is going to the next level is because the people at the top have a vision of seeing great fights. We have another great example of that this Saturday night at Barclays Center

"Anytime you have a great event, it's going to start with the undercard. We have a lot of young fighters looking to show off their skills. We're thrilled to have our very own Richardson Hitchins and Kenny Robles competing in exciting undercard action."

STEPHEN ESPINOZA, Executive VP & General Manager, SHOWTIME Sports

"Saturday is a testament to SHOWTIME's commitment to boxing and boxing fans. We've worked hard to deliver the most important bouts from around the world. We have three separate telecasts, five fights, across two continents.

"We will also be streaming Katie Taylor's U.S. debut. People know Katie from reputation alone, and we thought it was important to have her fight seen. The heavyweight fight between Gerald Washington and Jarrell Miller is another one that deserves to be seen and I think it could be the fight that steals the show.

"The main event has two of the brightest young stars in boxing. They both feel like they've been on this stage for a while. You know their resumes and you have to give them all of the credit in the world for taking this fight. Neither had to take this fight, but it will be one of the most exciting matchups of the summer.

"We have had 19 live presentations and 15 world title fights so far and we're proud of what we've done accomplished so far. Boxing has had a great year and much of that has been carried by SHOWTIME boxing. That will continue this Saturday."