LOS ANGELES – Errol Spence, Jr. knows that Sean Porter's perseverance is one of the greatest qualities of a WBC light heavyweight champion.
Spence is also confident that he will ultimately win Porter's determination in their 12th round 147-fight to unite the pounds. The undefeated IBF Champion has promised again on Friday that he will become the first opponent to knock out the hard-working, gritty Porter on Saturday night at the Staples Center.
"I know he is a solid fighter, he will come to fight," Spence told FOX Sports & Heidi Androl after weighing them at the Intercontinental Los Angeles hotel. "But as I said, I will violate his will and be the first person to stop Sean Porter."
The 31-year-old Porter (30-2 -1, 17 KO) from Akron, Ohio, has lost only a pair of 12-round decisions since becoming a pro in October 2008.
Kel Brooke defeated him with a majority decision to take the IBF light heavyweight title by Porter in August 2014 in Carson, California. In June 2016, former WBA middleweight champion Keith Thurman led Porter by unanimous decision in a closely contested match.
29-year-old Spence (25-0, 21 KOs) from DeSoto, Texas, expects a real challenge from Porter, although Spens is commonly cited as a 10-1 favorite in Las Vegas and online sports books.  "He's a fighter," Spence said. "He's a champion, just like me, and we will. I've been wanting the WBC belt for a long time and now he'll hand it to me on Saturday night. Or I'll download it. "
Porter battled Thurman and Brooke and defeated five former heavyweight champions, including Danny Garcia. With all due respect to its long list of quality opponents, Porter believes Spence will provide the toughest test of his career in the main event of four-bit FOX Sports Pay-Per-View telecast (9pm ET / 6pm) PT; $ 74.95 in HD).
"Oh, he knows what he is," Porter said. "He will prepare for the fight and I will be ready for the fight. Listen, you're all for good. He and I, the best, will go up to the ring and do it. He has all the tools, I have all the tools. My tools better than his? His tools better than mine? We'll find out. Great battle. ”
Keith Idek is a senior writer / columnist at BoxingScene.com. You can find him on Twitter @Idecboxing.