He's on a run... The young Czech is the third player born in 2005 to make an ATP quarter-final 🎾 It's time to get to know him a little more as he dominates in Doha. SUBSCRIBE: bit.ly/2dj6EhW WEBSITE: atptour.com FACEBOOK: facebook.com/ATPTour TWITTER: twitter.com/ATPTour INSTAGRAM: instagram.com/atptour About the Official ATP Tour YouTube Channel: As the global governing body of men’s professional tennis, the ATP’s mission is to serve tennis. We entertain a billion global fans, showcase the world’s greatest players at the most prestigious tournaments, and inspire the next generation.