Robin Haase defeated Damir Dzumhur 7-5 6-3 6-7 2-6 6-4 in the NED vs BIH round robin on hard. The upset overturned the form book — Damir Dzumhur came in leading the head-to-head 2–1. That levelled the head-to-head at 2–2.
Haase R. came through in five sets.
Hard: Haase R. leads 2–0 · Clay: Dzumhur D. leads 2–0
Robin Haase beat Damir Dzumhur 7-5 6-3 6-7 2-6 6-4. Umpiry, "Robin Haase vs Damir Dzumhur — NED vs BIH Round Robin", https://umpiry.com/match/2017-04-07/dzumhur-vs-haase-ned-vs-bih-rr?utm_source=cite (as of 7 April 2017).