Shintaro Mochizuki
Osaka wins but Great Britain prevail at United Cup, Swiss through to quarter-finals
Stefanos Tsitsipas and Maria Sakkari help Greece to winning start at United Cup
United Cup groups determined as Coco Gauff to lead United States in title defence
Coco Gauff and Taylor Fritz to feature at United Cup versus Poland and Iga Swiatek
ATP roundup: Shintaro Mochizuki stuns top seed Taylor Fritz in Tokyo