Actually, according to some of his opponents, he used these tantrums like he uses his volley. McEnroe is prone to throwing a tantrum when the match is close or he senses a turn in the momentum. I think it's probably a valid insight.
Wilson Six.One 95 16X18 Babolat Syn Gut 17 @ 55
Strung Weight 358g 359g Balance 31cm 31cm