Al Haymon’s “Premier Boxing Champions” series airs on back to back nights tonight (Friday, September 11, 2015) and tomorrow (Saturday). Tonight at the Ricoh Coliseum in Toronto, Canada, the event will air on Spike TV and features WBC World Light Heavyweight Champion Adonis Stevenson (26-1) defending his belt against Tommy Karpency (25-4-1). The 12-round bout has no over/under set, and the line sees Stevenson come in a wide (-2500) favorite over Karpency , who returns at (+1400). The bottom line is that Stevenson opted to take this fight rather than work through a tough negotiation with Sergey Kovalev to give everyone the fight theywant to see at Light heavyweight. For his part, Karpency took 2013 off and has returned to win four fights in a row, including a split decision win over Chad Dawson in that run. Nevertheless, Stevenson is expected to hold on to his belt after this one. The Welterweight 10-round co-main event sees undefeated Errol Spence Jr (17-0) taking on Chris Van Heerden (23-1-1). Spence is a member of the dissappointing 2012 US Olympic team, but he he is considered a top prospect despite not winning a medal in London. Spence Jr is a huge (-2150) favorite over Van Heerden, who comes back at (+1300 ). Van Heerden has been a pro for almost ten years, and he has won eight fights in a row, including the last four which he fought in the United States after leaving his native South Africa, The Saturday night fights air on NBC from the Foxwoods Resort in Mashantucket, Connecticut are headlined by a Middleweight 10 round bout featuring (31-0-1) Peter Quillin as he takes on Michael Zerafa (17-1). Quillin is bouncing back quickly from an April draw with Andy Lee, and he is a big-time (-12500) favorite to win this one, and Zerafa is coming back at (+5000). Quillin is talented, but he vacated the WBO World title recently and he failed to make weight against Lee, giving away a title shot on the scales. The 23 year old Australian Zerafa is making just his second appearance outside of his home country. Also on the broadcast is 42 year old IBF Super Welterweight champion Cornelius Bundrage (34-5) as he defends his belt against undefeated Jermall Charlo (21-0). Bundrage is coming in as a big (+1100) underdog to Charlo, who is coming back at (-1700).