Edited sentence: " Massad Ayoob remarked in a Black Belt article that "Arvanitis was a visionary - he anticipated mixed martial arts as a sport twenty years before its time.Another contributor to mixed martial arts was Greek-American Jim Arvanitis who introduced a modern form of pankration to mainstream martial arts as early as 1973.His combat sport/art combined standup and ground fighting skills adapted from four primary sources: Western boxing, Greco-Roman wrestling, Muay-Thai, and Combat Judo.Sparring with gloves similar to those worn in MMA contests today were used to simulate what Arvanitis called the "Reality of Combat