Jelena Jankovic advanced when Kateryna Volodko retired 6-1 1-0 in the Rome round of 16.
Jankovic J. advanced when Volodko K. retired.
Jankovic J. and Volodko K. faced 7 of the same opponents in the last 12 months. Jankovic J. went 10–3 (77%) against them, Volodko K. 2–5 (29%). Jankovic J. came out clearly better against 3 of 5 comparable opponents, Volodko K. against 0.
Jelena Jankovic beat Kateryna Volodko 6-1 1-0 after Kateryna Volodko retired. Umpiry, "Jelena Jankovic vs Kateryna Volodko — Rome Round of 16", https://umpiry.com/match/2009-05-06/jankovic-vs-volodko-rome-r16?utm_source=cite (as of 6 May 2009).