The American admitted that he has never used the rule as of now as he and his coach never communicate during matches. While that's highly unlikely Fritz is adamant that tennis is an individual sport and that coaching has no place in it:
“I haven’t talked to Mike [Russell, my coach] and he hasn’t talked to me one time since the coaching has become a thing. It’s a dumb rule. Tennis is an individual sport."
Fritz even went as far saying that he hates it:
“Why are we making it not an individual sport? A huge part of tennis is, in my mind, like as tennis is as much mental as it is physical, and a big part of it is you need to be figuring it out on the court for yourself. You need to be the one figuring it out. I think it’s ridiculous that you can be mentally not there, not good analytically, not good at kind of working through things and coming up with strategies, and you can have someone tell you what to do. I hate it.”