When Nick Diaz and Robbie Lawler met for the first time at UFC 47 in April 2004, fans were treated to one of the most iconic fights in UFC history.
Diaz, then 20, and Lawler, aged 22, first fought at Mandalay Bay in Las Vegas, on the main card of the UFC 47: 'It's On!' pay-per-view event, headlined by Chuck Liddell's second-round knockout victory over bitter rival Tito Ortiz in a battle between two of the biggest stars in the sport of mixed martial arts at the time.
On the same card, Andrei Arlovski came up trumps in his short-notice fight against Wesley Correira, while Yves Edwards earned $12,000 for his efforts courtesy of a split decision over Hermes Franca.
But the night was really all about Diaz, who arguably stole the show thanks to a memorable performance early in his career.
Lawler, by this stage already being recognised as a future star in the making, was a heavy favourite coming into the fight, and rightfully so.
Among the most devastating strikers in the welterweight division, 'Ruthless' had finished all but two of his wins by knockout, including former UFC fighters Tiki Ghosn and Chris Lytle.
Like Lawler, Diaz had also only had a handful of fights at the time, but made a name for himself by capturing the vacant IFC welterweight title in just his second professional fight.
Before that, the oldest Diaz brother made his MMA debut at IFC Warriors Challenge 15 in August 2001, and won the fight via triangle choke submission in the first round.
However against Lawler, Diaz decided to switch things up and show off his new and improved striking, much to the amazement of legendary commentators Joe Rogan and Mike Goldberg.
It was here that Diaz also demonstrated his famous 'Stockton slap' at the expense of Lawler, who looked uncharacteristically out of sorts.
Diaz was the aggressor throughout much of the contest, and began to land low kicks and significant strikes.
But as Lawler tried to close the distance, a right hand caught him flush on the chin and floored him, forcing referee Steve Mazzagatti to call a stop to the contest at 1 minute 31 seconds of the second round.
BT Sport recently re-uploaded the full fight replay to their YouTube channel as part of the build-up to the rematch. You can check it out below:News Now - Sport News