Luksika Kumkhum advanced when Madison Keys retired 6-2 4-3 in the Osaka quarter-final.
Kumkhum L. advanced when Keys M. retired.
Kumkhum L. and Keys M. faced 2 of the same opponents in the last 12 months. Kumkhum L. went 0–2 (0%) against them, Keys M. 2–0 (100%).
Only 2 common opponents — too few for any conclusion. Shown without assessment.
Luksika Kumkhum beat Madison Keys 6-2 4-3 after Madison Keys retired. Umpiry, "Luksika Kumkhum vs Madison Keys — Osaka Quarter-final", https://umpiry.com/match/2014-10-10/keys-vs-kumkhum-osaka-qf?utm_source=cite (as of 10 October 2014).