Gulberk Gultekin defeated Ipek Senoglu 6-3 6-7 6-3 in the Istanbul 10K round of 16 on hard. The upset overturned the form book — Ipek Senoglu came in leading the head-to-head 1–0. Gulberk Gultekin claimed a first win over Ipek Senoglu in two meetings, levelling the head-to-head at 1–1.
Gultekin G. came through in three sets.
Gulberk Gultekin beat Ipek Senoglu 6-3 6-7 6-3. Umpiry, "Gulberk Gultekin vs Ipek Senoglu — Istanbul 10K Round of 16", https://umpiry.com/match/1999-06-28/gultekin-vs-senoglu-istanbul-10k-r16?utm_source=cite (as of 28 June 1999).