McEnroe is a nasty bit of work. Will never forget when I watched him play an exhibition at the a Royal Albert Hall in the early noughties. A lines lady called a ball of his which was clearly out. He ended up winning the game anyway, but because he did not like her call (even though it was the correct call) he went right up to her and started shouting in her face "you're ****, you're ****" after every subsequent point he was at her end of the court just to initimidate her to giving him favourable calls. For all his talent he was a Class A arsehole on the tennis court.