Jack Sock defeated Soong Jae Cho 6-7 7-6 6-3 in the USA F4 round of 16 on clay.
Sock J. came through in three sets.
Jack Sock beat Soong Jae Cho 6-7(5) 7-6(1) 6-3. Umpiry, "Jack Sock vs Soong Jae Cho — USA F4 Round of 16", https://umpiry.com/match/2011-01-31/cho-vs-sock-usa-f4-r16?utm_source=cite (as of 31 January 2011).