Frederik Nielsen defeated Igor Sijsling 5-7 6-3 6-2 in the New Haven q16 on hard. The upset overturned the form book — Igor Sijsling came in leading the head-to-head 1–0. Frederik Nielsen claimed a first win over Igor Sijsling in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-03-15 | Great Britain F4 | QF | hard | Igor Sijsling | 6-3 4-6 6-1 |
Averages over each player's completed matches in the selected window (187 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About