Don King was hoping to put the best two lightweight boxers in the world together in the same ring. Joel Casamayor will indeed be at the MGM Grand on Sept. 13, but he will not be fighting Nate Campbell; instead, Juan Manuel Maquez will move up from the super featherweight division to take a crack at Casamayor’s WBO interim title.

Marquez is coming off a disputed split decision loss in March to Manny Pacquiao, Ring Magazine’s No. 1-ranked pound-for-pound boxer. That high-profile fight ensures a healthy HBO pay-per-view buyrate for Sept. 13; the fight itself might not be so pretty. Marquez is the –325 favorite with Casamayor fighting from behind at +250. It’s expected Casamayor will force the pace in this matchup, which is saying something at age 36. Expect a slow dance that will go the full 10 rounds.

Campbell has a mandatory fight with Joan Guzman (–205) that should be more entertaining, and will be made available on Showtime.