Jack Sock | TENNIS.com

Aviators soar into first place, spoil Jack Sock's debut

Ryan Harrison outduels Sock in marquee showdown.

American talent runs deep in Mylan World TeamTennis

Sam Querrey, John Isner, Jack Sock, Steve Johnson, the Bryans and more are playing WTT.

Top American men take the court as Mylan WTT kicks off 42nd season

The Springfield Lasers’ Jack Sock leads a strong contingent of the top seven U.S. men.

The last American man to win Wimbledon was Pete Sampras in 2000.

The No. 14 seed lost to Jiri Vesely of the Czech Republic, 7-5, 7-5, 6-3, on Monday.