Fritz is furious: "Why should anyone help you?"
Since match coaching was officially authorized by the ITF, Taylor Fritz has been one of the first and foremost opponents of this contested decision.
Questioned in a press conference following his authoritarian victory over Daniil Medvedev (6-4, 6-3) in his first group match, Fritz was once again critical of this change in the rules: "Yeah, I think one of the things that makes tennis such a unique, cool sport is that it's really as much mental as it is physical.
People change what they do on the court to adapt to the opponent.
I don't want a coach to be able to say to someone: 'Hey...'. Sometimes you see things differently when you're not playing the game.
I think tennis is a sport where you don't just play against each other, but also mentally fight against each other. That's a very important aspect of the game. I don't think many people realize that.
I think you have to play almost at the highest level to really understand the extent of strategy. It's something that should stay between the two players.
I think being able to strategize, to make decisions, to find solutions under pressure is just as important as serving or hitting a forehand.
It wouldn't make sense for someone to come onto the court and serve for you, would it? So why should anyone tell you what to do?
That's how I feel. I compare it to everything you do in the field. Why would anyone help you?
I have no problem with that in team competitions like the ATP Cup, the Davis Cup or the Laver Cup.
It makes sense. Training, okay. For individual matches, the rest of the season, it makes no sense to me."
ATP Finals 
Without any doubt, one of the main instigators of the reason for the rule change was the blatant use by Tsitsipas & his Father, along with the rule change re; timings & amount of bathroom breaks, that can be taken during a match.