Heidi El Tabakh defeated Kelly Liggan 6-2 6-2 in the Waterloo 25K round of 32 on clay. The upset overturned the form book — Kelly Liggan came in leading the head-to-head 1–0. Heidi El Tabakh claimed a first win over Kelly Liggan in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-11-07 | Mexico City 3 25K | R32 | clay | Kelly Liggan | 6-4 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.