Thiem, from Austria, the fourth seed in the men's event and runner-up in 2018, was fulfilling his press obligations after the match after reaching the last 16 on Saturday.
However, he was informed that Williams needed the main interview room, which had just suffered a defeat in the third round against Sofia Kenin.
It was the first outing of a winner of 23 Grand Slam titles in a Slam in almost five years and she was anxious to be away from the tournament site as quickly as possible.
"It's just the beginning," Thiem told Eurosport in German.
"Even if there is a junior there, every player has to wait."
<p clbad = "canvas-atom canvas-text Mb (1.0em) Mb (0) – sm Mt (0.8em) – sm" type = "text" content = "Added:" It also shows a bad personality in my opinion. I'm 100 percent sure (Roger) Federer or (Rafael) Nadal would never do something like that. " data-reactid = "28"> He added: "In my opinion, it also shows a bad personality, I'm 100% sure (Roger) Federer or (Rafael) Nadal I would never do something like that."
There was no indication of who had decided to change Thiem midstream on Saturday night.
"It's a joke," Thiem, 25, told media officials after being told he had to finish his interviews in a smaller room.
"I have to leave the room because she's coming in. What the hell, I do not care, I can also do what I want."
Roger Federer, meanwhile, threw himself into Thiem's defense, describing him as "a superstar, a male superstar."
"I think the one who is still in the tournament has priority, that's how I see it," Federer said after spending Sunday on Leonardo Mayer to reach his 54th quarter final in the majors.
"There must have been a misunderstanding or maybe they should have kept Serena still in the locker room, not waiting here in the press center.
"I do not know exactly what happened, I understand Dominic's frustration, I do not think he's angry with Serena or anyone, I think it was an unfortunate situation."
The former German grandmaster Boris Becker also said that Thiem had the right to object to his eviction.
"If he is giving an interview, and his press conference is not over, then everyone else has to wait, including Serena Williams," Becker told Eurosport on Monday.
"It was unfortunate that the organizers put both players in that situation and should know that if Dominic is doing his press conference, when it's over it will be Serena's turn.
"It was an uncomfortable situation."
The French sports newspaper L & # 39; Equipe claimed that Williams had not shown any preference over where he held his press conference.
"Put me in another room, a smaller one, but now," he told himself he had said.
Reportedly, Williams is becoming increasingly impatient, officials sought to rescue the situation by moving Thiem to another room.
"That's really discourteous," he was heard to say.
<p clbad = "canvas-atom canvas-text Mb (1.0em) Mb (0) – sm Mt (0.8em) – sm" type = "text" content = "Thiem will return to the press conference on Monday as it is scheduled to face hope at home Gael Monfils for a place in the quarterfinals. "data-reactid =" 44 "> Thiem will return to the press conference on Monday, as he is scheduled to face his home in the hope that Gael Monfils will take a place in the quarters. of final.