5. Melvin Manhoef vs. Robbie Lawler
As far as middleweights go, Robbie Lawler and Melvin Manhoef are perhaps the single most devastating strikers in the class.
Both possess true one-punch knockout power, which Melvin has translated all the way up the heavyweight division, infamously KO'ing former K-1 World Grand Prix Champion Mark Hunt in just 18 seconds in December of 2008.
Both Lawler and Manhoef, another veteran of the K-1 circuit, met in January of last year under the Strikeforce banner.
Manhoef attacked early and often on the lead leg with chopping low kicks. Lawler was visibly hurt in the early going, and just as the Dutchman waded in for the finish, the American caught him with a devastating right hook, sealing the deal in what was one of the biggest comeback's in recent memory.