Spong met Nathan Corbett at Champions of Champions II on June 27, 2009, in what was widely considered a battle between the two best Muay Thai fighters in the world at their weight class, for the W.M.C. world title -93 kg. The fight was close, with Spong knocking Corbett down in the second round, and ended with a controversial decision. In the third round, Corbett knocked Spong out with a right hook causing the referee to stop the fight. However, due to the referee's misleading hand signals, Corbett rushed back in and knock Spong down once more, not sure that the fight had been stopped. After considerable confusion, the fight was declared a no contest.