Former unified Heavyweight ruler Ruiz Jr. (35-2-1 22 KOs) is back in action after a two-year absence from the ring and having penned a promotional deal with Eddie Hearn and Matchroom last week, Mexico’s first ever Heavyweight king is ready to reignite his quest to become a two-time World champion.

The 36-year-old stunned the sporting world in June 2019 when he dethroned Anthony Joshua on a historic night in New York, and last tasted action in August 2024 in a back-and-forth majority draw with Jarrell Miller in Los Angeles, the third bout in a row in his home city following wins over Chris Arreola and Luis Ortiz.

Standing in the way of Ruiz Jr’s plans to get back to the summit of the Heavyweight division is Knyba (17-1 11 KOs), with the Polish giant looking end ‘The Destroyer’s’ grand plans at the first hurdle. The 6ft 7in is looking to bounce back to winning ways at the first attempt after taking on newly anointed WBC champion Agit Kabayel for the interim title in Germany in January. Knyba fights at the Prudential Center for the fourth time in his career, and the 30-year-old can move into line for a World title crack with victory.

“I’m going to be fighting in Newark, New Jersey on September 4 baby,” said Ruiz Jr. “After we get this victory, I would love to fight all the guys that have the belts the Oleksandr Usyk vacated and we’re going to become a two-time champion next year, let’s get it.”

“I can’t wait to be back at the Prudential Center, my second home,” said Knyba. “I’m excited to be back in the ring in front of the New Jersey and New York fans, and they will fill the seats with white and red.”

Ruiz Jr’s clash with Knyba leads a stacked card in New Jersey, with the co-feature bout pitting another new Matchroom signing Vito Mielnicki Jr. against World Middleweight title challenger Austin ‘Ammo’ Williams.

Mielnicki Jr. (23-1 13 KOs) penned a deal with Eddie Hearn’s Matchroom and Boxlab Promotions recently, and immediately steps into the biggest fight of his career to date on home turf. The 24-year-old made his pro debut at the Prudential Center in June 2019 when he was still in High School, and the Roseland, NJ native is looking to make strides in the 160lbs division by claiming a big win in his Matchroom bow.

For Williams (20-2 12 KOs) this must-win bout behind enemy lines represents a massive chance to get right back into the World title mix following a spirited performance in his first World title battle in Orlando in March, taking WBC champion Carlos Adames the distance.

"Every fight is another chapter in my story, and on September 4, I'm ready to write my biggest one yet,” said Mielnicki Jr. “I respect Ammo Williams because he has proven himself against top competition, but this is my time. I've dedicated my life to becoming a World champion, and every sacrifice I've made has prepared me for moments like this.

“When that bell rings, fans are going to see a fighter who is hungry, confident, and ready to prove he belongs among the elite. I'm coming to make a statement and take another step towards a World title.”

“The 'Ammo Show' is coming to you live on TNT Sports and DAZN!” said Williams. “I am brimming with excitement to have this platform and opportunity to display my talents globally once again. After my previous World Championship bout with Adames, I learned valuable lessons about what it takes to dominate at the highest level.

“The hardest thing for me to do was separate from my family for the first time, all for the sake of seclusion and total focus. I have taken my talents to Dallas, TX to train with Derrick James, a current undisputed World Champion creator, and everyday I get to soak in new knowledge from a completely different perspective. This is the move and sacrifice that will unlock my superstardom and propel me to the level of undisputed World Champion.

“I feel refreshed, renewed, happy, and focused to leave the world wide-eyed, and gasping for air from the artistic mutilation of a human being live on global television. Don't blink, this bout just might steal the show!”

Further early undercard announcements for the card see another hometown talent will look to shine in their backyard as Newark’s Zaquin Moses fights for the eighth time in the paid ranks. Moses (7-0 3 KOs) has already recorded a pair of six round wins in 2026, and the 21-year-old’s first fight at home will also be his first eight rounder.

“We ina bityyyyyy!” said Moses. “Make sure y’all come support watch me beat on someone NEWARK! We outside! #homecoming.”

"We are excited to welcome Matchroom Boxing to Prudential Center for the first time,” said Dylan Wanagiel, Vice President, Sports Properties and Special Events, Prudential Center. “We are proud to provide a stage for elite competitors hailing from around the world and also those fighting in their own back yard here in New Jersey. This event promises to deliver an exciting showcase of the sweet science to Brick City, and we look forward to the unique energy of Fight Night."

“This is going to be a great night in New Jersey,” said promoter Eddie Hearn. “It’s great to have Andy as part of the Matchroom team, and everyone knows that at his best, he can be a devastating performer. Andy is driven to getting back into the World title mix, so September 4 is a must-win night for him against the giant Pole Knyba.

“Mielnicki Jr. vs. Williams is a cracking fight in the Middleweight division, with Vito stepping up in his first bout with Matchroom to take on the always-dangerous Ammo who has the World title experience to build on – the winner of this one is going to arrow in on a massive fight at 160lbs later this year.

“I’m excited to see Zaquin fight at home for the first time in his young career, it’s really important that rising stars like Zaquin get the opportunity to shine in front of their own fans at home.

“There’s going to be plenty more top-class action to be added to the card on a night of first for so many, not least for us at Matchroom as we head to the fantastic Prudential Center side the first time with our first promotion as part of the exciting new series “The Fight” with TNT and DAZN – I cannot wait to get to The Garden State for this huge night on September 4.”
 
About The Fight 
The Fight is a new monthly boxing series from TNT Sports and DAZN, built to deliver the sport’s biggest matchups and rising stars on a consistent national stage. Featuring top fighters from leading global promoters, each event airs live on TNT Sports and DAZN platforms in the U.S. and streams worldwide on DAZN, creating a seamless, multi-platform experience that brings fans closer to the action than ever before. Across TNT Sports’ networks and platforms, including Bleacher Report and House of Highlights, additional original programming and digital content will spotlight the personalities, storylines and stakes driving each event.
 
About Prudential Center
Prudential Center is a world-class sports and entertainment venue located in downtown Newark, New Jersey. Opened in October 2007, the state-of-the-art arena is the home of the National Hockey League’s (NHL) three-time Stanley Cup Champion New Jersey Devils, Seton Hall University’s NCAA Division I Men’s Basketball program, Professional Women’s Hockey League’s (PWHL) New York Sirens and more than 210 concerts, family shows and special events each year. Ranked in the Top 10 worldwide by Pollstar, Billboard and various other industry publications, Prudential Center is recognized as one of the premier venues in the United States, and hosts over 2 million guests annually.

About DAZN

Welcome to DAZN, the global sports streaming platform that transcends boundaries and redefines the way fans experience their favorite sports. With availability in over 200 territories, DAZN ensures that sports enthusiasts around the world can immerse themselves in the thrill of live and on-demand content, on any device, at the touch of a button.

Purpose-built to seamlessly stream live sports on a global scale, whether its Boxing, MMA, Football, Wrestling, NFL, Tennis, we've got you covered — alongside an extensive catalog of live and on-demand content, making us the go-to destination for sports entertainment.

DAZN isn't just the Global Home of Boxing; it's a trailblazer in transforming the viewers experience. Through strategic partnerships with the biggest and most established boxing promoters, we bring top-class, epic boxing matches to fans worldwide, delivering unforgettable moments straight to your screens.

Our vision extends beyond broadcasting; we are on a mission to revolutionize the entire sports entertainment landscape by placing the customer at the core of an innovative entertainment proposition. DAZN is constructing a singular, frictionless sports entertainment platform where fans can not only watch their favorite sports but also engage in betting, gaming, socializing, sharing, and even purchasing tickets, NFTs, and merchandise—all in one place.

Whether you prefer a traditional, more passive sports-watching experience or crave a gamified and interactive adventure, DAZN caters to your preferences. We're not just streaming sports; we're crafting an all-encompassing sports entertainment universe where every fan can find their perfect match. Join DAZN today and elevate your sports-watching experience to new heights.

About Matchroom Boxing

After the success of snooker in the 1980s, Matchroom Sport moved into boxing with two small hall shows followed by Frank Bruno v Joe Bugner at Tottenham Hotspur’s ground – the biggest boxing event of 1987. That launched the company into the boxing big-time, a position it has maintained ever since.

Through the 1990s Matchroom Sport’s boxing roster featured many of the biggest names in the sport including Lennox Lewis, Nigel Benn, Chris Eubank, Steve Collins and Naseem Hamed, all in world title fights and it continues to work with some of the biggest names in UK boxing including Audley Harrison, the 2000 Olympic Super-Heavyweight gold medalist.

Over the years, Matchroom Sport has built up long-standing relationships with broadcasters around the world and with the advent of the Prizefighter phenomenon, the company’s boxing division has never been in a stronger position.

From fantastic six round scraps between the sport’s journeymen, up to multi-million-dollar World Championship contests featuring the above fighters, the Pro Box series has it all. Each show is packed with the very best in boxing action in a series that encompasses almost 25 years of Matchroom Sport’s commitment to bringing the highest quality to the global television market.