Sergi Duran defeated Andrei Rybalko 3-6 7-6 in the Spain 1 Masters 4 round of 16 on clay. The upset overturned the form book — Andrei Rybalko came in leading the head-to-head 1–0. Sergi Duran claimed a first win over Andrei Rybalko in two meetings, levelling the head-to-head at 1–1.
Duran S. won the match.
Sergi Duran beat Andrei Rybalko 3-6 7-6. Umpiry, "Sergi Duran vs Andrei Rybalko — Spain 1 Masters 4 Round of 16", https://umpiry.com/match/1999-01-02/duran-vs-rybalko-spain-1-masters-4-r16?utm_source=cite (as of 2 January 1999).