H2H data updated: 2026-09-01 00:00 UTC

Daniel Altmaier vs Christopher O'Connell H2H: 0-2

Christopher O'Connell holds a 2–0 lead over Daniel Altmaier in their ATP head-to-head. Across 2 main-draw meetings, Christopher O'Connell leads 1–0 on grass and 1–0 on hard courts. Most recently, Christopher O'Connell won the 2024 Belgrade round of 16 6-3 6-1.

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Daniel Altmaier
Germany Age 27 Right-Handed 188 cm / 6'2"
H2H
0 – 2
2 main draw meetings
Christopher O'Connell
Australia Age 32 Right-Handed 183 cm / 6'0"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Christopher O'Connell #71 6-3 6-1 Daniel Altmaier #93 Match data Nov 8, 2024* R16 Belgrade ATP 250 Hard
Daniel Altmaier #52 3-6 7-6(5) 6-4 Christopher O'Connell #73 Match data Aug 13, 2023* Q1 Q Cincinnati Open Masters 1000 Hard
Christopher O'Connell #74 6-3 6-1 Daniel Altmaier #59 Match data Jun 15, 2023* R32 Stuttgart Open ATP 250 Grass

1 qualifying meeting shown in the table; qualifying is excluded from the H2H score. Estimated match date where the exact historical date is unavailable. Arrows show an edition's recorded category and documented modern equivalent; unresolved editions keep their recorded category. Asterisked totals include editions mapped from documented historical predecessor categories. Mapping details.

Career Comparison

Player Current Peak Pts Elo W L Win % GS 1000 including documented historical predecessor categories Finals 500 including documented historical predecessor categories 250 including documented historical predecessor categories Titles
Daniel Altmaier #57 #44 1,148 1,774 80 132 37.7% 0 0 0 0 0 0
Christopher O'Connell #106 #53 930 1,820 65 99 39.6% 0 0 0 0 0 0

Career Progression by Age

Seasons are aligned by the age each player spent most of that calendar year. GS and Titles are cumulative career totals through that season.

Age Daniel Altmaier Christopher O'Connell
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
18 2017 2–3 40.0% #275 1,540 0 0 — — — — — — —
20 2019 0–1 0.0% #279 1,530 0 0 — — — — — — —
21 2020 3–3 50.0% #130 1,670 0 0 — — — — — — —
22 2021 7–8 46.7% #84 1,725 0 0 — — — — — — —
23 2022 5–21 19.2% #94 1,564 0 0 2017 0–2 0.0% #393 1,524 0 0
24 2023 14–22 38.9% #56 1,648 0 0 — — — — — — —
25 2024 12–22 35.3% #89 1,629 0 0 — — — — — — —
26 2025 22–28 44.0% #46 1,758 0 0 2020 1–2 33.3% #120 1,510 0 0
27 2026 15–24 38.5% #57 1,718 0 0 2021 4–9 30.8% #175 1,660 0 0
28 — — — — — — — 2022 6–12 33.3% #78 1,708 0 0
29 — — — — — — — 2023 19–23 45.2% #68 1,719 0 0
30 — — — — — — — 2024 17–22 43.6% #64 1,741 0 0
31 — — — — — — — 2025 13–21 38.2% #116 1,658 0 0
32 — — — — — — — 2026 5–8 38.5% #106 1,672 0 0

Surface Results by Age

Seasons are aligned by the age each player spent most of that calendar year. Results cover completed main-draw matches. Bold green marks the higher win percentage when both players have at least 5 matches on that surface at the aligned age.

Age Daniel Altmaier Christopher O'Connell
Yr HardClayGrass Yr HardClayGrass
W L M Win % W L M Win % W L M Win % W L M Win % W L M Win % W L M Win %
18 2017 — — — — 0 2 2 0.0% 2 1 3 66.7% — — — — — — — — — — — — —
20 2019 — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — —
21 2020 0 2 2 0.0% 3 1 4 75.0% — — — — — — — — — — — — — — — — —
22 2021 1 1 2 50.0% 6 6 12 50.0% 0 1 1 0.0% — — — — — — — — — — — — —
23 2022 2 11 13 15.4% 1 6 7 14.3% 2 4 6 33.3% 2017 0 2 2 0.0% — — — — — — — —
24 2023 4 12 16 25.0% 10 8 18 55.6% 0 2 2 0.0% — — — — — — — — — — — — —
25 2024 7 10 17 41.2% 4 11 15 26.7% 1 1 2 50.0% — — — — — — — — — — — — —
26 2025 15 18 33 45.5% 6 7 13 46.2% 1 3 4 25.0% 2020 1 2 3 33.3% — — — — — — — —
27 2026 3 9 12 25.0% 8 11 19 42.1% 4 4 8 50.0% 2021 4 6 10 40.0% 0 2 2 0.0% 0 1 1 0.0%
28 — — — — — — — — — — — — — 2022 5 9 14 35.7% 1 2 3 33.3% 0 1 1 0.0%
29 — — — — — — — — — — — — — 2023 7 12 19 36.8% 8 8 16 50.0% 4 3 7 57.1%
30 — — — — — — — — — — — — — 2024 17 17 34 50.0% 0 4 4 0.0% 0 1 1 0.0%
31 — — — — — — — — — — — — — 2025 10 13 23 43.5% 3 5 8 37.5% 0 3 3 0.0%
32 — — — — — — — — — — — — — 2026 5 7 12 41.7% 0 1 1 0.0% — — — —
Career — 32 63 95 33.7% 38 53 91 41.8% 10 16 26 38.5% — 49 68 117 41.9% 12 22 34 35.3% 4 9 13 30.8%

Performance Progression by Age

Seasons are aligned by the age each player spent most of that calendar year. Detailed serve and return statistics available for 208/213 of Daniel Altmaier's and 162/164 of Christopher O'Connell's main draw matches. Sample is shown as matches with detailed serve and return statistics / total main draw matches. Bold green marks the stronger value when both stat samples contain at least 5 matches; lower is better for DFs/M.

Age Daniel Altmaier Christopher O'Connell
Yr Sample Aces/M DFs/M 1st Sv% 1st Pts% 2nd Pts% BP Saved% BP Conv% Svc Pts% Ret Pts% Yr Sample Aces/M DFs/M 1st Sv% 1st Pts% 2nd Pts% BP Saved% BP Conv% Svc Pts% Ret Pts%
18 2017 5/5 8.0 3.0 60.9% 71.1% 44.6% 56.4% 32.9% 60.5% 28.9% — —/— — — — — — — — — —
20 2019 1/1 2.0 3.0 59.1% 46.2% 33.3% 0.0% 50.0% 40.9% 31.9% — —/— — — — — — — — — —
21 2020 6/6 5.7 2.8 57.7% 69.1% 45.9% 68.5% 31.2% 58.7% 37.5% — —/— — — — — — — — — —
22 2021 15/15 5.6 2.9 59.2% 71.6% 47.5% 68.3% 47.6% 61.6% 36.4% — —/— — — — — — — — — —
23 2022 26/26 6.8 2.7 61.2% 69.6% 46.0% 59.0% 37.1% 60.5% 32.0% 2017 2/2 4.0 3.5 62.1% 64.7% 50.0% 65.7% 6.7% 59.0% 26.2%
24 2023 35/36 5.9 2.3 65.7% 68.6% 51.6% 61.3% 38.7% 62.8% 34.7% — —/— — — — — — — — — —
25 2024 34/34 5.9 2.6 63.2% 69.9% 48.5% 56.5% 37.3% 61.8% 34.1% — —/— — — — — — — — — —
26 2025 47/50 7.7 2.5 59.6% 71.8% 46.4% 55.1% 36.3% 61.6% 33.3% 2020 3/3 7.7 2.0 63.9% 68.4% 49.5% 72.2% 42.9% 61.5% 32.9%
27 2026 39/40 6.2 2.8 63.6% 70.3% 47.1% 51.4% 34.9% 61.7% 33.8% 2021 13/13 8.2 1.2 62.9% 75.2% 52.0% 60.8% 40.3% 66.5% 32.1%
28 — —/— — — — — — — — — — 2022 18/18 8.3 2.6 63.4% 71.2% 48.3% 61.9% 32.8% 62.7% 34.7%
29 — —/— — — — — — — — — — 2023 42/42 6.9 1.9 62.0% 73.1% 50.7% 61.9% 32.8% 64.6% 34.0%
30 — —/— — — — — — — — — — 2024 39/39 7.5 2.0 59.5% 73.7% 50.7% 61.7% 34.2% 64.3% 33.4%
31 — —/— — — — — — — — — — 2025 33/34 6.3 1.8 59.5% 68.7% 49.2% 60.6% 30.5% 60.5% 34.2%
32 — —/— — — — — — — — — — 2026 12/13 8.6 1.5 56.7% 71.8% 47.5% 57.3% 39.4% 61.2% 31.1%
Career — 208/213 6.5 2.6 62.1% 70.2% 47.7% 57.3% 37.4% 61.5% 33.8% — 162/164 7.3 1.9 60.8% 72.0% 50.0% 61.4% 33.6% 63.2% 33.5%

Advanced Statistics Comparison by Age

Seasons are aligned by the age each player spent most of that calendar year. Metrics are precomputed from eligible main-draw results; point-stat values use the available detailed sample. Bold green marks the stronger value when both underlying samples are sufficient. Lower is better for Schedule because a negative value means a tougher schedule. Career Schedule is normalized per 100 matches.

Age Daniel Altmaier Christopher O'Connell
Yr Elo P+ Serve+ Return+ PD TPW% Hard Elo Clay Elo Grass Elo Set Win % Set Margin Dec. Set Tiebreak Pressure+ Schedule Yr Elo P+ Serve+ Return+ PD TPW% Hard Elo Clay Elo Grass Elo Set Win % Set Margin Dec. Set Tiebreak Pressure+ Schedule
18 2017 1541 104.5 -1.83 -2.08 0.731 44.9% — — +66 33.3% -1.17 2–0 2–2 (50%) — +0.15 — — — — — — — — — — — — — — — —
20 2019 1530 102.6 -2.67 -4.21 0.540 36.3% — — — 0.0% -4.00 — — — 0.00 — — — — — — — — — — — — — — — —
21 2020 1670 121.4 -2.65 +1.70 0.909 48.3% — +46 — 58.8% -0.18 0–1 3–1 (75%) — -0.16 2015 1495 104.2 — — — — — — — — — — — — —
22 2021 1726 125.4 -2.00 -0.47 0.947 49.7% — +75 — 45.7% 0.00 3–4 (43%) 1–5 (17%) — -0.06 — — — — — — — — — — — — — — — —
23 2022 1564 125.6 -1.76 -3.41 0.811 46.4% -64 +115 +4 26.9% -1.31 3–6 (33%) 3–8 (27%) — -0.18 2017 1525 115.5 -0.12 -0.17 0.638 43.9% — — — 16.7% -2.17 0–1 1–1 — -0.10
24 2023 1648 137.5 -1.07 -0.53 0.932 48.9% -114 +131 — 44.2% -0.29 3–10 (23%) 6–10 (38%) — +0.65 2018 1518 105.8 — — — — — — — — — — — — —
25 2024 1630 131.3 -1.48 -1.33 0.893 48.3% -32 +35 — 40.7% -0.52 3–5 (38%) 12–9 (57%) — +0.54 2019 1494 99.2 — — — — — — — — — — — — —
26 2025 1758 141.9 -1.65 -1.43 0.865 47.6% -36 -1 -218 43.1% -0.49 8–7 (53%) 10–13 (43%) — +0.62 2020 1510 117.0 +2.22 +2.41 0.854 48.6% +35 — — 36.4% -0.55 — 1–1 — -0.18
27 2026 1719 131.8 -2.25 -1.10 0.883 48.0% -64 +14 -139 38.3% -0.72 7–4 (64%) 7–10 (41%) — -1.78 2021 1661 126.7 +0.93 -2.95 0.959 49.2% -16 — — 43.9% -0.29 2–7 (22%) 7–6 (54%) — -0.33
28 — — — — — — — — — — — — — — — — 2022 1708 136.6 -1.02 -1.54 0.930 48.9% -4 -132 — 42.6% -0.43 1–5 (17%) 8–6 (57%) — -0.26
29 — — — — — — — — — — — — — — — — 2023 1720 137.5 +0.91 -1.80 0.960 49.3% -32 -99 +28 45.4% -0.32 7–8 (47%) 16–12 (57%) — -1.95
30 — — — — — — — — — — — — — — — — 2024 1742 145.4 -0.18 -0.88 0.933 49.0% +1 -145 — 45.7% -0.29 2–4 (33%) 7–8 (47%) — -1.68
31 — — — — — — — — — — — — — — — — 2025 1659 134.1 -2.50 -1.21 0.866 47.8% +93 -88 -11 38.7% -0.73 4–4 (50%) 5–9 (36%) — -0.58
32 — — — — — — — — — — — — — — — — 2026 1672 124.8 -2.07 -2.74 0.800 46.8% +74 — — 33.3% -1.22 1–2 (33%) 4–3 (57%) — -0.23
Career — 1775 137.1 -1.71 -1.32 0.878 47.9% -57 +57 -84 40.3% -0.59 29–37 (44%) 44–58 (43%) 99.2 -0.10 — 1821 140.3 -0.47 -1.49 0.911 48.6% +20 -105 +16 42.3% -0.49 17–31 (35%) 49–46 (52%) 98.0 -3.28

Career Rivalries

Each player's five most-played main-draw opponents. The current matchup is highlighted when it appears in a player's top five.