Serena Williams, Lleyton Hewitt lead U.S. Open midterm grades

Monday September 2nd, 2013
Former world No. 1 Lleyton Hewitt knocked out 2009 winner Juan Martin Del Potro in the second round.
Kathy Willens/AP

NGUYEN: Hewitt turns back the clock, proves few possess his tenacity

SI Apps
We've Got Apps Too
Get expert analysis, unrivaled access, and the award-winning storytelling only SI can provide — from Peter King, Tom Verducci, Lee Jenkins, Grant Wahl, Andy Staples and more — delivered straight to you, along with up-to-the-minute news and live scores.