The championship match, initially set for June 19, was delayed due to a foot injury sustained by Walker. Eventually, the event took place, attracting a huge audience and raising approximately $375,000 for the Italian Hospital Fund.

From the first bell, Walker focused on attacking Greb’s body, delivering powerful left hooks aimed at the ribs. The younger challenger dominated the opening round and continued to inflict damage on Greb’s midsection in the early rounds, leading to leg cramps for the champion between rounds. Reports from the time celebrated the second round as one of the most exhilarating ever, marked by a rapid pace and relentless exchanges.

As the fight progressed, Greb began to adapt. Starting in the fourth round, he enhanced his movement, delivered punches from various angles, and overwhelmed Walker with a higher volume of strikes. Even after enduring ponderous blows, Greb famously jogged to his corner between rounds to demonstrate his stamina.

Both fighters faced significant challenges during the bout. Greb reportedly lost several teeth throughout the fight, while Walker battled through a bloodied nose. Each fighter retaliated with robust punches, refusing to concede any ground.

The pivotal moment came in the 14th round, when Greb launched an intense offensive and landed a devastating right hand that hurt Walker. The challenger later described the impact of the punch as feeling “like a man walking in a dream,” as Greb continued to unleash a barrage of punches with Walker cornered near the ropes. Walker managed to survive the onslaught and finished the 15th round strongly, but it was not enough to close the gap on Greb’s lead.

When referee Eddie Purdy declared Greb the winner by unanimous decision, the resilient champion successfully defended his world middleweight title in one of his career’s defining moments.

The rivalry continued beyond the ring. Boxing lore suggests that later that night, Greb and Walker crossed paths in a Novel York nightclub, where a heated argument escalated into another fight, requiring police intervention—an incident that has become one of boxing’s lasting legends.

Greb would lose the middleweight title to Tiger Flowers the following year and tragically passed away in 1926 due to complications from surgery. Meanwhile, Walker captured the middleweight title later that same year, further solidifying his Hall of Fame career.

No known footage of this remarkable bout exists, leaving contemporary newspaper accounts from 1925 as the sole detailed record of this unforgettable championship match.