Lopez, the current 140-pound world champion, approached Crawford at ringside and asked, "When we gonna fight?" Crawford acted like he couldn't hear him, which only added fuel to the fire.
Things escalated quickly when Crawford warned Lopez's father, "Don't you ever touch me again, next time you touch me I'mma slap you." Lopez Sr. fired back, daring Crawford to "slap me now."
The situation got more intense as Crawford tried to poke Lopez's face. Lopez wasn't having it and smacked Crawford's hand away.
"I want to fight the best," Lopez said. "If he's the best, let's make the fight happen. You scared I'm gonna beat you in front of the whole world?"
Crawford recently won a world title in his fourth weight division, capturing the super-welterweight (154 pounds) championship. He's now looking to move up again to face Saul 'Canelo' Alvarez at 168 pounds.
Lopez, who's 27, wants Crawford to stay at 154 pounds for a potential fight. The weight difference is significant, with Lopez currently competing at 140 pounds.
Crawford's team has previously dismissed the idea of fighting Lopez. His coach, Brian 'BoMac' Mcintyre, said the match-up is "not competitive" and the only rewarding part would be seeing Crawford knock Lopez out.
In an interview with Broadway Joel, Lopez shared his side of the story, expressing his desire to face the best in the sport.
It's unclear if this confrontation will change Crawford's team's stance on fighting Lopez. For now, the bad blood between these two champions continues to simmer, leaving fans wondering if they'll ever settle their differences in the ring.