Daniel Cox defeated Marcus Willis 6-7 7-6 6-1 in the Great Britain F13 qualifying round on hard. The result followed the form book — Daniel Cox came in leading the head-to-head 8–2. Daniel Cox extended the head-to-head to 9–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-07-13 | Great Britain F7 | SF | grass | Daniel Cox | 6-2 6-3 |
| 2015-03-16 | Great Britain F4 | QF | hard | Daniel Cox | 6-3 7-6(6) |
| 2015-01-19 | Great Britain F1 | SF | hard | Daniel Cox | 6-7(4) 6-3 6-3 |
| 2013-09-09 | Great Britain F19 | SF | hard | Daniel Cox | 4-6 6-3 6-4 |
| 2013-08-26 | Great Britain F17 | F | hard | Daniel Cox | 6-2 6-3 |
| 2013-07-15 | Great Britain F14 | QF | grass | Marcus Willis | 7-6(2) 6-4 |
| 2012-07-02 | Great Britain F9 | R32 | grass | Daniel Cox | 6-4 7-6(5) |
| 2010-09-20 | Great Britain F15 | QF | hard | Daniel Cox | 7-5 6-2 |
| 2010-07-05 | Great Britain F9 | R32 | grass | Marcus Willis | 3-6 6-4 7-6(2) |
| 2006-11-06 | Great Britain F17 | R32 | hard | Daniel Cox | 6-4 6-3 |
Averages over each player's completed matches in the selected window (104 vs 24). 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