Jelena Jankovic defeated Andrea Hlavackova 6-1 6-4 in the 's Hertogenbosch round of 16 on grass.
Jankovic J. took it in straight sets.
Jankovic J. and Hlavackova A. faced 3 of the same opponents in the last 12 months. Jankovic J. went 0–4 (0%) against them, Hlavackova A. 1–2 (33%). Only 1 of the comparisons are context-comparable — too few for a conclusion.
Only 3 common opponents — small sample, treat as indicative.
Jelena Jankovic beat Andrea Hlavackova 6-1 6-4. Umpiry, "Jelena Jankovic vs Andrea Hlavackova — 's Hertogenbosch Round of 16", https://umpiry.com/match/2015-06-08/hlavackova-vs-jankovic-s-hertogenbosch-r16?utm_source=cite (as of 8 June 2015).