Antal Van Der Duim defeated Boy Westerhof 6-1 6-3 in the China F8 qualifying round on hard. The upset overturned the form book — Boy Westerhof came in leading the head-to-head 5–3. Antal Van Der Duim narrowed the head-to-head to 5–4.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2014-10-20 | Zimbabwe F2 | F | hard | Boy Westerhof | 6-7(5) 7-5 3-0 |
| 2014-06-09 | Netherlands F1 | F | clay | Boy Westerhof | 6-7(6) 6-3 6-4 |
| 2013-08-26 | Netherlands F6 | SF | clay | Antal Van Der Duim | 7-6(8) 6-3 |
| 2012-02-06 | China F3 | SF | hard | Boy Westerhof | 6-2 2-1 |
| 2009-08-31 | Netherlands F5 | R32 | clay | Antal Van Der Duim | 7-6(9) 6-3 |
| 2007-12-10 | Nigeria F3 | R32 | hard | Boy Westerhof | 7-6(5) 6-3 |
| 2006-09-11 | Netherlands F7 | R16 | clay | Antal Van Der Duim | 6-1 6-4 |
| 2006-06-12 | Netherlands F1 | R16 | clay | Boy Westerhof | 6-3 6-4 |
Averages over each player's completed matches in the selected window (31 vs 42). 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