John Isner defeated Juan Martin del Potro 7-6 6-4 in the London round of 32 on carpet. The upset overturned the form book — Juan Martin del Potro came in leading the head-to-head 4–1. John Isner narrowed the head-to-head to 4–2.
Isner J. took it in straight sets.
Isner J. and del Potro J. faced 4 of the same opponents in the last 12 months. Isner J. went 3–2 (60%) against them, del Potro J. 4–0 (100%). del Potro J. came out better against 2 of 3 comparable opponents, Isner J. against 0.
Only 4 common opponents — small sample, treat as indicative.
Carpet: Isner J. leads 1–0 · Hard: del Potro J. leads 4–1
John Isner beat Juan Martin del Potro 7-6(2) 6-4. Umpiry, "John Isner vs Juan Martin del Potro — London Round of 32", https://umpiry.com/match/2016-06-15/isner-vs-potro-london-r32?utm_source=cite (as of 15 June 2016).