H2H data updated: 2026-11-08 00:00 UTC

Gabriel Diallo vs Daniel Altmaier H2H: 1-0

Gabriel Diallo holds a 1–0 lead over Daniel Altmaier in their ATP head-to-head. Across 1 main-draw meeting, Gabriel Diallo leads 1–0 on grass. Most recently, Gabriel Diallo won the 2025 Wimbledon first round 6-1 6-2 6-4.

Canada Age 25 Right-Handed 203 cm / 6'8"
H2H
1 – 0
1 main-draw meetings
Germany Age 28 Right-Handed 188 cm / 6'2"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Gabriel Diallo #40 6-1 6-2 6-4 Daniel Altmaier #44 Match data Jul 2, 2025* R128 Wimbledon Grand Slam Grass

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
Gabriel Diallo #169 #33 1,388 1,881 44 52 45.8% 0 0 0 0 1 1
Daniel Altmaier #63 #44 1,148 1,780 84 136 38.2% 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 Gabriel Diallo Daniel Altmaier
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 2023 1–4 20.0% #139 1,477 0 0 2020 3–3 50.0% #130 1,670 0 0
22 2024 6–7 46.2% #87 1,720 0 0 2021 7–8 46.7% #84 1,725 0 0
23 2025 28–23 54.9% #41 1,812 0 1 2022 5–21 19.2% #94 1,564 0 0
24 2026 9–18 33.3% #169 1,675 0 1 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 1,763 0 0
27 — — — — — — — 2026 19–28 40.4% #63 1,702 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 Gabriel Diallo Daniel Altmaier
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 2023 1 3 4 25.0% — — — — 0 1 1 0.0% 2020 0 2 2 0.0% 3 1 4 75.0% — — — —
22 2024 6 5 11 54.5% 0 1 1 0.0% 0 1 1 0.0% 2021 1 1 2 50.0% 6 6 12 50.0% 0 1 1 0.0%
23 2025 13 16 29 44.8% 6 4 10 60.0% 9 3 12 75.0% 2022 2 11 13 15.4% 1 6 7 14.3% 2 4 6 33.3%
24 2026 5 9 14 35.7% 1 5 6 16.7% 3 4 7 42.9% 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%
27 — — — — — — — — — — — — — 2026 7 13 20 35.0% 8 11 19 42.1% 4 4 8 50.0%
Career — 25 33 58 43.1% 7 10 17 41.2% 12 9 21 57.1% — 36 67 103 35.0% 38 53 91 41.8% 10 16 26 38.5%

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 94/98 of Gabriel Diallo's and 216/221 of Daniel Altmaier'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 Gabriel Diallo Daniel Altmaier
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 2023 5/5 8.2 5.0 60.9% 68.0% 47.5% 48.0% 53.6% 59.8% 32.5% 2020 6/6 5.7 2.8 57.7% 69.1% 45.9% 68.5% 31.2% 58.7% 37.5%
22 2024 13/13 9.6 3.0 68.9% 70.6% 45.8% 66.8% 37.4% 63.0% 36.6% 2021 15/15 5.6 2.9 59.2% 71.6% 47.5% 68.3% 47.6% 61.6% 36.4%
23 2025 50/51 8.8 2.6 66.8% 74.3% 52.5% 51.8% 40.9% 67.0% 34.2% 2022 26/26 6.8 2.7 61.2% 69.6% 46.0% 59.0% 37.1% 60.5% 32.0%
24 2026 26/29 7.5 2.8 68.4% 70.7% 45.3% 50.7% 44.4% 62.5% 32.1% 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%
27 — —/— — — — — — — — — — 2026 47/48 7.0 2.9 63.7% 70.7% 48.6% 53.1% 34.3% 62.5% 33.0%
Career — 94/98 8.5 2.9 67.2% 72.5% 49.3% 53.4% 42.0% 64.8% 33.9% — 216/221 6.7 2.6 62.2% 70.3% 48.0% 57.4% 37.1% 61.7% 33.7%

Advanced Statistics Comparison by Age

Seasons are aligned by the age each player spent most of that calendar year. Metrics use eligible main-draw results; point statistics use matches with detailed data. 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 Gabriel Diallo Daniel Altmaier
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 2022 1515 106.2 — — — — — — — — — — — — — 2019 1530 102.6 -2.67 -4.21 0.540 36.3% — — — 0.0% -4.00 — — — 0.00
21 2023 1477 113.3 -0.84 -1.39 0.807 46.9% +37 — — 33.3% -1.33 0–2 2–1 (67%) — +0.22 2020 1670 121.4 -2.65 +1.70 0.909 48.3% — +46 — 58.8% -0.18 0–1 3–1 (75%) — -0.16
22 2024 1721 129.3 +0.04 +0.66 0.990 50.0% 0 — — 48.6% +0.05 1–2 (33%) 3–6 (33%) 98.2 -0.02 2021 1726 125.4 -2.00 -0.47 0.947 49.7% — +75 — 45.7% 0.00 3–4 (43%) 1–5 (17%) 95.3 -0.06
23 2025 1813 144.7 +2.74 -0.89 1.036 50.8% -74 -118 -48 54.0% +0.22 7–7 (50%) 13–11 (54%) 105.0 -1.80 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%) 95.9 -0.18
24 2026 1675 131.2 -1.70 -1.59 0.856 47.8% +10 -68 +57 37.9% -0.69 4–4 (50%) 7–9 (44%) 99.1 -0.20 2023 1648 137.5 -1.07 -0.53 0.932 48.9% -114 +131 — 44.2% -0.29 3–10 (23%) 6–10 (38%) 93.8 +0.65
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%) 101.5 +0.54
26 — — — — — — — — — — — — — — — — 2025 1764 138.9 -1.65 -1.43 0.865 47.6% -42 +17 -233 45.3% -0.41 6–7 (46%) 9–12 (43%) 101.3 +0.64
27 — — — — — — — — — — — — — — — — 2026 1703 135.4 -1.89 -1.22 0.881 48.0% -53 +40 -128 41.7% -0.61 10–4 (71%) 12–12 (50%) 109.1 -2.19
Career — 1882 138.1 +0.95 -0.90 0.963 49.6% -32 -99 -9 47.3% -0.16 12–15 (44%) 25–27 (48%) 101.6 -1.89 — 1780 136.8 -1.66 -1.34 0.878 47.9% -57 +65 -83 41.2% -0.56 30–37 (45%) 48–59 (45%) 100.5 -0.28

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.