Federico Delbonis

IMAGE: Nick Kyrgios in recent years had become as well known for on-court antics and outbursts as he was for his punishing serve. Photograph: Sean M. Haffey/Getty Images A smiling, smitten Nick Kyrgios said he has never felt better…

IMAGE: It was Roman Safiullin's first time playing an ATP Tour quarter-final. Photograph: Mackenzie Sweetnam/Getty Images Russian qualifier Roman Safiullin took down No. 1 seed Stefanos Tsitsipas of Greece 6-4, 6-4, Friday in the…

'If I'm honest I have to say that I'm not here for a miraculous comeback like on other occasions. I know the limitations I have physically, and we'll see later.'   IMAGE: In his career, Juan Martin del Potro has won 22 titles, including the…