Dominic Thiem is quite the Potterhead, as he revealed in a British-themed Would You Rather quiz.

When asked whether he preferred Harry Potter or James Bond, the 24-year-old responded, "I love both, but I love Harry Potter most. I mean, I know everything about him, about the movies, so I have to say Harry Potter."

At the suggestion that he would make a good Harry Potter, Thiem answered, "Ah yes, I would just need glasses, and a scar on my brain, and that's it."

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Thiem apparently knows everything about Harry Potter

His favorite London-specific mode of transportation?

"Big, red bus, for sure. I don't like tubes."

Thiem apparently knows everything about Harry Potter

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Thiem also got to hang out with Jack, the search-and-rescue dog.

"I think he's a clay-court dog," he joked.

In the ATP Finals, the Austrian recorded his first victory of the tournament with a three-set win over Rafael Nadal's replacement, Pablo Carreno Busta.

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This sets up a virtual quarterfinal for Friday between Thiem and David Goffin, Group Pete Sampras's other 1-1 player.