See Stefanos Tsitsipas accidentally nail his father while smashing his racquet in anger.
World No. 5 on key to breakthrough season.
Elina Svitolina on new coach Marcos Baghdatis' influence on her game.
Naomi Osaka on how nearly going off the deep end invoked fresh perspective.
Serena Williams offers self-coaching ahead of her Auckland return.
The Frenchman wants to make a career-high ranking this year.
The Greek said he felt better than he expected to on court but not perfect.
