Muay Thai is a stand-up striking sport, with two competitors in the ring throwing punches, elbows, knees and kicks at each other. Clinching, sweeps and throws are also allowed. K-1 is a fighting format that combines the most skilful and effective elements of all martial arts even if the “K” in its name refers to just three of them – karate, kick boxing and kung-fu. The “1” denotes the best, the absolute tip-top. Quibble at your peril.