Americans Sam Querrey, John Isner and Steve Johnson also lost in the second round.
Jan 10, 2018
The players on both tours try to gain momentum before the Australian Open begins.
Jan 07, 2018
by Steve Tignor
Kyrgios is still playing in Brisbane and Sock lost to Federer in the Hopman Cup Thursday.
Jan 04, 2018
by Kamakshi Tandon
The Swiss will also play mixed doubles; the American believes the injury isn't serious.
Jan 02, 2018
Federer's former coach also picked Jack Sock to win the Paris Masters.
Dec 22, 2017
by Zach Cohen