I think it's Roger. I think he speaks very intelligent and insightful and his accent is so beautiful. I can't tell if he's not a native speaker from the way he speaks English. I'm not a native speaker of the English language, so I might be wrong, but Federer speaks English very well. I think Djokovic is also prett close. He knows a lot of educated vocabulary. Though he has some strange accent, the way he puts words together to make sentences is quite native like, right? I like Zverev and Dimitrov. They're young and might have grown up in English speaking communities or something. At least, I can't help wondering if they really grew up in the countries that their nationalities suggest. What do you think?