Juan Martin del Potro defeated Andy Murray 6-4 5-7 6-7 6-3 6-4 in the GBR vs ARG round robin on hard. The upset overturned the form book — Andy Murray came in leading the head-to-head 6–2. Juan Martin del Potro narrowed the head-to-head to 6–3.
del Potro J. came through in five sets.
del Potro J. and Murray A. faced 10 of the same opponents in the last 12 months. del Potro J. went 8–3 (73%) against them, Murray A. 15–4 (79%). Results against comparable opponents are close (2 : 2 better-results split).
Hard: Murray A. leads 4–2 · Clay: Murray A. leads 2–1
Juan Martin del Potro beat Andy Murray 6-4 5-7 6-7 6-3 6-4. Umpiry, "Juan Martin del Potro vs Andy Murray — GBR vs ARG Round Robin", https://umpiry.com/match/2016-09-16/murray-vs-potro-gbr-vs-arg-rr?utm_source=cite (as of 16 September 2016).