Novak Djokovic improved to 19-0 in the first round of the U.S. Open, battling through some leg troubles to beat Learner Tien ...

He's the first man ever to win 80 matches in the largest tennis stadium in the world, since it made its debut in 1997.

The new two-day break after Day 1 at the US Open may be just what Novak Djokovic needs.  Djokovic largely cruised to a 6-1, 7-6, 6-2 win over American Learner Tien Sunday night to advance to the ...