Macenroe is probably the best example of the GREAT BENEFIT of utilizing gamesmanship to one's benefit. He would throw one of his ****yfits when behind, going off on anyone within ice-pitcher reach, while his opponent stood or sat idly by--losing their rhythm. Invariably, when play resumed, Macenroe would pull ahead having destroyed his opponent's match momentum. As the OP's father wisely taught him to prepare to ward off such gamesmanship moment's, I wonder if johnny mac's old man taught his son how to effectively utilize such disruptive incidents for personal benefit and gain-- his old man certainly didn't discipline his son not to. And now his old man is a high up USTA official.
"...the human emotional system was not designed to endure the mental rigors of a tennis match." Dr. Allen Fox