WATCH: Thiem, Dennis Novak talk blond hair, car crash

Dominic Thiem has long had one of the most dynamic games in tennis, and heading into the 2020 season, he now has a hairstyle to match—with blond tips in the vein of an early 2000s singer, or a late-'90s Roger Federer.

But Austrian teammate Dennis Novak, on a Q&A drive in Sydney ahead of the new ATP Cup, took credit for setting the trend.

"Actually, I had it first, in the summer," Novak said. "I wanted it silver, but after a few weeks it went to blond."

Thiem, part of the ATP interview too, then noted that he sported a similar look in 2015, and explained his decision to go blond again in the offseason.

"I had one day off still in Miami, I went to the hairdresser and that's it," he said. "I really love the hairstyle now, even though many people around me don't."

Novak, when asked to share a funny story about his time with Thiem, recounted a minor car accident, in which he was driving and a slow crash broke Thiem's door, trapping Thiem in the car.

"It was not my fault," Novak laughed.

ATP Cup photo-ops have been in full force as the first edition of the event approaches.

Thiem starred in one flattering Team Austria pool video ...

As well as one where he gets betrayed by his teammates:

Austria plays its ATP Cup opener on Saturday, taking on a tough Croatia squad featuring Marin Cilic and Borna Coric. Debatably, Thiem and Novak have already won the battle for best hair.