

Marin Cilic defeated Nuno Borges 6-7 6-4 6-4 in the Estoril round of 16 on clay. The upset overturned the form book — Nuno Borges came in ranked #48. Marin Cilic extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2026-06-12 | s Hertogenbosch | R16 | grass | Marin Cilic | 6-3 3-6 |
| 2026-01-05 | Hong Kong | R16 | hard | Nuno Borges | 7-5 6-3 |
Averages over each player's completed matches in the selected window (191 vs 200). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About