Alex Calatrava defeated Robert Kraus 6-3 3-6 6-3 in the Portugal 4 Masters 3 round of 32 on hard. The upset overturned the form book — Robert Kraus came in leading the head-to-head 1–0. Alex Calatrava claimed a first win over Robert Kraus in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1992-07-13 | Spain 6 Masters 1 | R32 | clay | Robert Kraus | 5-7 6-2 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.