Ivo Karlovic defeated Yen Hsun Lu 4-6 7-6 6-7 7-6 7-5 in the US Open round of 128 on hard. The upset overturned the form book — Yen Hsun Lu came in leading the head-to-head 3–2, defending last year's round of 128, but Ivo Karlovic had been the form player, winning 5 of their last 7 on hard. Ivo Karlovic narrowed the head-to-head to 3–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2014-10-05 | Shanghai Masters | R32 | hard | Ivo Karlovic | 7-6 6-3 |
| 2014-06-09 | Halle | R16 | grass | Yen Hsun Lu | 7-6 7-6 |
| 2014-02-10 | Memphis | SF | hard | Ivo Karlovic | 6-1 |
| 2012-06-13 | London | R32 | carpet | Yen Hsun Lu | 6-7(3) 7-6(6) 7-6(7) |
| 2012-06-11 | Queen's Club | R32 | grass | Yen Hsun Lu | 6-7 7-6 7-6 |
Averages over each player's completed matches in the selected window (200 vs 120). 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