Head to head
2
Hard
1
1
Grass
0
John Millman's wins on the left · Reilly Opelka's on the right · bar lengths share one scale
All meetings (4)
| 2022 | Delray Beach | Hard | SF | Reilly Opelka | 7-6(8) 6-7(3) 7-6(4) |
| 2021 | Washington | Hard | R16 | John Millman | 6-3 7-6(4) |
| 2021 | Queen's Club | Grass | R32 | John Millman | 7-6(4) 5-7 7-6(6) |
| 2019 | Tokyo | Hard | SF | John Millman | 6-3 7-6(4) |
Methodology
Head-to-head totals and surface splits exclude walkovers (no match was played), which follows ATP convention — walkover meetings still appear in the match list. The momentum chart plots the running lead across all counted meetings, oldest to newest.