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4:21 p.m.
Jack Sock, the last U.S. man flying the flag at the French Open, is earning what would be a first-ever chance to test himself against the French Open's greatest champion, Rafael Nadal.
Sock, ranked 37th, is up two sets and a break against 18-year-old Borna Coric, billed as a kid to watch but who is feeling the pressure of his first foray into the third round of a major tournament.
If 22-year-old Sock closes out a win, his first ever last-16 match at a major will likely be against Nadal, because the nine-time champion is up one set against his third-round opponent, Andrey Kuznetsov.