Khachanov stuns Kyrgios, Garcia tops Gauff at US Open

NEW YORK, Sept. 6 (Xinhua) -- Russia's Karen Khachanov has reached his first Grand Slam semifinal after a hard-fought win over Nick Kyrgios, edging the Australian firebrand 7-5, 4-6, 7-5, 6-7(3), 6-4 at the US Open on Tuesday.

Wimbledon runner-up Kyrgios, who had defeated top seed Daniil Medvedev in the last round, could not maintain his mojo in an intense quarterfinal which lasted more than three and an half ho