Santana and Lundy, who came in at 134- and 135-pounds, respectively, were posing for a photo with promoter Don King and former heavyweight champion Larry Holmes when a brief scuffle broke out between the fighters and their camps.
King, Holmes and others were quick to separate the camps and restore order, as Santana (14-1, 11 knockouts) and Lundy (23-3-1, 11 KOs) calmed down.
"You have to respect the man for getting in there, but this man is not even in my class. You have to crawl before you walk, and this guy is trying to walk before he crawls," said Lundy, 30.
"At the end of the day, we all know that I’ve faced the tougher fighters. We all know I have the better record. But it's that man in me, and not my record, that you have to beat."
Nicknamed "Hammerin' Hank," Lundy bounced back from two consecutive losses with a unanimous decision over Olusegun Ajose in his last fight in July.
"When I fought Ajose, everybody said he would destroy me," said Lundy. "When you doubt the hammer, the hammer is always going to come up big. I'm top 10 in the world. This guy doesn't have anything on me."
A 25-year-old southpaw from Cuba, Santana had his streak of seven consecutive knockouts ended following a ninth-round stoppage loss to Bahodir Mamadjonov in his last fight in April.
"Everything is going according to plan for this fight. It's been about six months of preparation. The errors I made in my last fight have been fixed. That won't happen again. I have an opportunity in this fight to erase it all tomorrow night. It’s a great opportunity that Showtime is giving me. I've prepared for everything," said Santana.
"So there will be no surprises. The only surprise will be for my opponent. He’s fought a lot of talented fighters, but that doesn't mean I don't have the talent to fight him and beat him. He hasn't fought me yet, so his wins don't mean anything. I’m prepared for the full 10 rounds. It's always great to get the KO, and we'll definitely look for it. But I also like to box. I'm not just a knockout puncher."
In the opening bout of the card, junior lightweight Amir Imam (12-0, 11 KOs) of Albany, N.Y., will pursue his 12th straight knockout victory against South Carolina's Jared Robinson (14-0, 6 KOs), whom he out-weighed 140-to-139.5.
"We're not even if you look at our records. If you go a little deeper, his record is not as impressive at face value. I'm going to use my speed and boxing skills to take his power away from him," said Robinson, 31.
"His power won't be a factor in this fight. I’ve faced the better opposition than him, and fighting on ShoBox gives me that extra motivation to overcome anything he throws at me. The sky is the limit for me. But I need a win first and I’ll take it from there."
Imam, 23, has gone four rounds twice, once, for a unanimous decision in his professional debut. Imam has eight second round stoppage wins, with the two others being in the first round.
"Fighting on national television makes me step it up a notch. You have to because everyone is watching. Yeah, I have a lot of knockouts on my record, but I'm just looking for a win. If the knockout comes, it comes. He's going to learn from the master on Friday. The fans love me. I'm going to put on a show," said Imam.
"He hasn’t faced what I've faced, sparred what I've sparred. He simply doesn't have the experience that I have. But it doesn't matter who he's faced, because he hasn’t faced me. It makes it sweeter if I get the KO. Everybody says I don't go deep into fights and don't get rounds, but it's not my fault I'm better than them."