Earlier in his career, it was a bit of a liability, especially the 2nd serve. Now, he runs in and out of the corners, can hit a little bit of slice, mixes in the body kick. And it's one of the best on the ATP Tour now."
Piala Davis: antara reformasi, kritik, dan budaya nasional 
Saat bintang tenis berganti lapangan: dari Noah sang penyanyi hingga Safin sang deputi, pertandingan lain bernama transisi karier 
Laboratorium tenis masa depan, apakah Masters Next Gen masih punya masa depan? 
Tenis: fakta tak terduga tentang intersaison, antara istirahat, stres dan bertahan secara fisik 
Shanghai 
