01/By surface
each with its own count, at equal weight
Hard
0-1
Connell C. leads 1-0 in 1 meeting on hard
Clay
Never on clay
no meeting on this surface
Grass
0-1
Connell C. leads 1-0 in 1 meeting on grass
02/Every meeting
2 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, D. first |
|---|---|---|---|---|---|---|
| Nov 6, 2024 | Belgrade OpenATP250 | hard | 2nd round | O Connell C. | 6-3, 6-1 | 93 v 71 |
| Jun 13, 2023 | Stuttgart OpenATP250 | grass | 1st round | O Connell C. | 6-3, 6-1 | 59 v 74 |
A record, never a share of meetings. Main-draw singles since 2013; a meeting ended by retirement is counted with the sets that were played and marked; a walkover is listed and counted in neither column. Altmaier D. and O Connell C. each carry the table against every opponent faced.