Ash Barty's French Open triumph has been labelled the ''poorest'' decider ever seen by former doubles winner and Romanian billionaire Ion Tiriac in a bizarre grilling of the newly-crowned champion.

Barty stamped her authority as one of the great players on tour with a breakthrough Grand Slam victory, taking care of 19-year-old Marketa Vondrousova with a 6-1 6-3 straight sets victory.

But Tiriac, a former top 10 player and owner of the Madrid Open, was bored by the event and told local Romanian news GSP that he had to walk out of the match after just four service games in because of the lack of quality on display.

"The Roland Garros women's final was one of the poorest I've ever seen," Tiriac said.

"Please excuse my sincerity. It was not one that excited me. I had to go after four games. I did it!"

Tiriac went on to call Romanian star Simona Halep, Maria Sharapova, Serena Williams, Martina Navratilova as "celebrities who are outstanding", but he refused to place Barty in the same category.

His rant went on to take a swipe at the Australian public and claimed Barty's only advantage was that she comes from a country that has a history of players who can master the technicalities of the sport.

"Now comes Barty, who has only one merit. She's an Australian!" he said.

"They do not know how to write or read. But every time someone comes from there, they come out with technical knowledge from A to Z."