RING and WBC light heavyweight champion Adonis "Superman" Stevenson weighed in at 173.5 pounds compared to 174.5 for Andrzej Fonfara, against whom he will defend his titles at Bell Centre in Montreal, Quebec on Showtime.
The 5-foot-11 Stevenson (23-1, 20 knockouts), 36, takes a run of 13-1, with 13 knockouts in his past 14 fights against Fonfara (25-2, 15 KOs), 26, having stopped 10 consecutive opponents since being knocked out by Darnell Boone in April 2010.
Fonfara brings a run of 15 straight victories, 12 by knockout, into the clash and was last in action during December's second-round knockout of Samuel Miller that followed a ninth-round stoppage of ex-beltholder Gabriel Campillo in August.
Fonfara last suffered defeat against Derrick Findley by second-round stoppage in July 2008 but did not blink during Friday's nose-to-nose post-weigh staredown with Stevenson, whom he vowed will get knocked out for the second time in his career.
"This is not the first time that people come here and say the same thing. But it will be the same thing for me, a knockout. [Late Hall of Fame trainer] Emanuel Steward always said that knockouts sell and that's what I'm going to bring," said Stevenson.
"It will be another exciting fight and aother exciting knockout. It will be an exciting fight and I will win again by knockout. It will be my first time on Showtime, so Showtime will see my 'Superman' punch."
In victory over Fonfara, Stevenson hopes to set up a potential showdown with 49-year-old Bernard Hopkins, who was in action last month with a majority decision victory over Beibut Shumenov, adding the WBA belt to Hopkins' IBF title.
"I'm not overlooking Fonfara. I'm focused on Fonfara," said Stevenson. "I'm not talking about Bernard Hopkins because now, it's fight time on Showtime and that will be against Fonfara. I'm thinking only of Andrzej Fonfara, so don't go and drink a beer because it will be quick."
Fonfara also promised a quick fight but with himself being the victor.
"I have a lot of fans and supporters here. A lot of my fans have come here to Montreal to support me. Tomorrow night, I'm going to fight for them and win for them. I think that Adonis is focused on the fight tomorrow and it will be a great show," said Fonfara.
"For sure, it will be a fight with heavy punches. Stevenson has a good punch and I think that you will see a knockout for sure. I can use that if I feel pressure and I'm motivated, then I will show everybody tomorrow that I will be the new champion."
For the co-main event, 25-year-old middleweight David Lemieux (31-2, 29 KOs) weighed 159.5 to 159 for Fernando Guerrero (26-2, 19 KOs).
"Fernando better be ready for the biggest fight of his life. I'm coming in strong and I'm at my strongest of my abilities. I've never been so strong in my entire career. I feel great, especially now that the weigh-in is done," said Lemieux, who is riding a six-fight winning streak that includes five knockouts.
"I always feel that the weigh-in is the hardest part of the camp. Now that the weigh-in is done, here comes the fun part. May 24 is going to be an awesome night and I can't wait to box. I can't say anything in the perspective about how Guerrero will come at me but I know one thing: once I land my shots, Guerrero will not take my shots."
Guerrero is a 27-year-old whose unanimous decision over Raymond Gatica in November helped him rebound from being dropped four times during his seventh-round stoppage loss to WBO middleweight titleholder Peter Quillin in April of last year.
"Fernando Guerrero is going to win. We've trained hard. This is the best camp that I've ever had in my life. We always train hard but every time, we've gotten better," said Guerrero, whose loss to Quillin ended a streak of four straight wins, three by knockout.
"We're smarter, better, stronger and we're going to use all of that. Not just one thing, we're going to use everything. I think Lemieux is a great fighter but he's going against me, so I'm a better fighter. I think that I know that I have a lot of knockout power and I'm willing to take it as much as I give it, so I'm willing to do both. I can take it and I can give it."
For their junior middleweight bout, Jermell Charlo (23-0, 11 KOs) and Charlie Ota (24-1-1, 16 KOs) weighed 153.75 and 153, respectively.
"The thing about being elite is that you have to step into the ring whenever you have to and that's no matter who [you're against]," said Charlo. "If you want to make it to the top, you've got to be willing to fight anybody and that's the way that I feel right now. I expect an excellent performance. I'm going for a grade 'A.' We talked about that before."
Referee: Frank Garza, Jr.
Judges: Richard De Carufel (Canada), John McKaie (New York), John Woodburn, Canada.
Referee: Michael Griffin
Judges: Nicolas Esnault (Canada), Ester Lopez (New Mexico), Pasqualie Procopio (Canada)
Jermell Charlo-Charlie Ota
Referee: Jean-Guy Brousseau.
Judges: Larry Hazzard Jr. (New Jersey), Jean LaPointe (Canada), Robert Paolino (Rhode Island),