Sock versus Zverev: whoever wins goes to the semis. Simple as that. I'd be surprised if it doesn't go three sets.
Jock works hard for a break at 4-3, sloppily goes down love-40 on his serve, but holds on and serves the set out, 6-4. Sock is using s classic, simple strategy: draw Alexander wide, then hit to the open spaces. Zverev isn't playing horribly but his shots have no zing, no zip, no intensity. By the end of the set, he looked like a spent force, so it will be interesting to see whether he can adjust his game in the second set. I wouldn't say it's a certainty.
2-love Zverev who after saving a break point on his own serve starts going for the corners on Sock's serve with fine down the line play off both wings. Another break for Alexander, 5-love in, like, fifteen minutes. Tables turned awfully fast on Jack....ends up 6-1.
Thought it would go three, but I have no clue who will take it. Zverev has the momentum but that meant nothing after the first set....might mean something in this one as Alexander quickly breaks for 1-love...after a horrible service game for Alex, Sock breaks back, 1-1. Flip a coin, I guess....Jack feeds Alex junk balls with no pace and Zverev responds with unforced errors and another break for Sock, 3-1....super dumb, error-prone tennis from Sock lets Alex back in the match, 4-3 on serve. Weird match....A Zverev double fault leads to a break point which Jack converts for the match.
A roller coaster ride but not exactly a fun one as the thrills were brought about by wheels continuously falling off for both players. Great result for Sock, though, to go this deep in the fifth most important tournament on the men's schedule.