On Sunday, speaking to Eurosport Germany, Thiem added: "Actually, I wasn’t angry or frustrated. Maybe for a couple of minutes or so.
"It is just the principle. It doesn’t matter, if it is me who sits in there. I still made a wrong statement. I said that I am not a junior anymore.
"But even if a junior is in there, every player has to wait. It is a matter of course. It also shows a bad personality in my opinion. I am a 100 percent sure (Roger) Federer or (Rafael) Nadal would never do something like that.”
Federer, a 20-times Grand Slam champion, said he understood Thiem's frustration.
"I think there is, with all the players, always a way to go that the one who is still in the tournament gets priority. Anyway, that's how I see it," he told reporters on Sunday.
"If I would have lost today against (Leonardo) Mayer, I would let Mayer go first or decide when he wants to go to press as he's got a next match.