Janko Tipsarevic took down Spaniard Juan Carlos Ferrero in four sets to advance to the quarterfinals of the 2011 U.S. Open where he could face fellow Serbian Novak Djokovic, the world's top-ranked men's tennis player. Tipsarevic powered his way through the match, serving up 20 aces to eight for Ferrero, tipping the scales in what was an otherwise very tightly played three hour and 43 minute match.
Ferrero, a former holder of the world No. 1 ranking, was broken at 5-5 in the third set in what proved to be the turning point in the match. Tipsarevic won the fourth and final set 6-2 in convincing fashion. Fittingly, Tipsarevic took match point on his 20th ace on the day. The win sends the 20th-ranked Tipsarevic to the first quarterfinal of his career. He entered the top 20 of the world rankings just last month.