Mariana Duque Marino defeated Katie Ruckert 6-2 6-1 in the Leon 10K quarter-final on hard. The upset overturned the form book — Katie Ruckert came in leading the head-to-head 1–0. Mariana Duque Marino claimed a first win over Katie Ruckert in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-05-15 | Obregon 10K | QF | hard | Katie Ruckert | 6-3 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.