
Us open: unseeded del potro's dream run continues as thiem retires in 4th round
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Juan Martin del Potro in US Open quarters. Juan Martin del Potro during his match against Dominic Thiem Juan Martin del Potro's summer renaissance continued on Monday as the unseeded
Argentine advanced into the U.S. Open quarter-finals when Austrian eighth seed Dominic Thiem quit their match with an injury. Del Potro, the 2009 U.S. Open winner, whose career has been
interrupted by a string of wrist surgeries and needed a wild card to get into the year's last grand slam, has made the most of his opportunity by reaching the last eight without
dropping a set. The towering Argentine's path was made a little easier when Thiem retired with an apparent knee injury trailing 6-3 3-2. Del Potro will now await the winner between
third seed Swiss Stan Wawrinka and Ukraine's Illya Marchenko.