Stefanos Tsitsipas hasn't taken the Coronavirus vaccine yet because pro tournament haven't made it mandatory to compete.
The third-ranked Tsitsipas shared he is not vaccinated yet during his pre-tournament press conference in Cincinnati.
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"I haven't. No one has told me anything," Tsitsipas said. "No one has made it a mandatory thing to be vaccinated.
"At some point I will have to, I'm pretty sure about it, but so far it hasn't been mandatory to compete, so I haven't done it, no."
Asked if he will take the vaccine if the ATP or tournaments mandate it, Tsitsipas replied "of course."
The Roland Garros runner-up revealed winning a Grand Slam title is a greater goal than attaining the world No. 1 ranking, reasoning if he can master a major the top ranking spot will come.
"I think winning a major—the possibilities of getting to No. 1 are most probable than—I don't know. I feel like winning a major can give you so many points, so much confidence, that eventually you're going to make it to No. 1," Tsitsipas said. "Talking about that in the position I am, it is going to be a big difference.
"If I would be ranked outside of top 10 or at around 8 or 7 in the world, it's a different story. But my answer is it would be a Grand Slam, let's say."
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