H2H data updated: 2026-09-01 00:00 UTC
Matteo Arnaldi holds a 1–0 lead over Lukas Klein in their ATP head-to-head. Across 1 main-draw meeting, Matteo Arnaldi leads 1–0 on hard courts. Most recently, Matteo Arnaldi won the 2024 Brisbane International second round 6-4 3-6 7-5.
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| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Matteo Arnaldi | 6-4 3-6 7-5 | Lukas Klein | Match data | Jan 5, 2024* | R16 | Brisbane International | ATP 250 | Hard |
| Lukas Klein | 6-4 4-6 6-4 | Matteo Arnaldi | Match data | Mar 22, 2023* | Q1 | Miami Open | Masters 1000 | Hard |
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.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Matteo Arnaldi | #36 | #29 | 1,485 | 1,906 | 73 | 78 | 48.3% | 0 | 0 | 0 | 0 | 0 | 0 |
| Lukas Klein | #288 | #109 | 544 | 1,736 | 10 | 16 | 38.5% | 0 | 0 | 0 | 0 | 0 | 0 |
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 | Matteo Arnaldi | Lukas Klein | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 21 | 2022 | 0–1 | 0.0% | #134 | 1,519 | 0 | 0 | — | — | — | — | — | — | — |
| 22 | 2023 | 17–14 | 54.8% | #44 | 1,824 | 0 | 0 | — | — | — | — | — | — | — |
| 23 | 2024 | 27–25 | 51.9% | #37 | 1,808 | 0 | 0 | 2021 | 2–4 | 33.3% | #258 | 1,560 | 0 | 0 |
| 24 | 2025 | 20–24 | 45.5% | #61 | 1,740 | 0 | 0 | 2022 | 0–1 | 0.0% | #136 | 1,559 | 0 | 0 |
| 25 | 2026 | 9–14 | 39.1% | #36 | 1,701 | 0 | 0 | 2023 | 0–1 | 0.0% | #170 | 1,559 | 0 | 0 |
| 26 | — | — | — | — | — | — | — | 2024 | 8–9 | 47.1% | #136 | 1,692 | 0 | 0 |
| 27 | — | — | — | — | — | — | — | 2025 | 0–1 | 0.0% | #142 | 1,621 | 0 | 0 |
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 | Matteo Arnaldi | Lukas Klein | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Hard | Clay | Grass | Yr | Hard | Clay | Grass | |||||||||||||||||||
| W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | |||
| 21 | 2022 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 2023 | 8 | 7 | 15 | 53.3% | 9 | 6 | 15 | 60.0% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 23 | 2024 | 17 | 15 | 32 | 53.1% | 9 | 8 | 17 | 52.9% | 1 | 2 | 3 | 33.3% | 2021 | 0 | 1 | 1 | 0.0% | 1 | 2 | 3 | 33.3% | 1 | 1 | 2 | 50.0% |
| 24 | 2025 | 13 | 16 | 29 | 44.8% | 7 | 6 | 13 | 53.8% | 0 | 2 | 2 | 0.0% | 2022 | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% |
| 25 | 2026 | 1 | 7 | 8 | 12.5% | 8 | 5 | 13 | 61.5% | 0 | 2 | 2 | 0.0% | 2023 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 26 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2024 | 6 | 6 | 12 | 50.0% | 2 | 3 | 5 | 40.0% | — | — | — | — |
| 27 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2025 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| Career | — | 39 | 45 | 84 | 46.4% | 33 | 26 | 59 | 55.9% | 1 | 7 | 8 | 12.5% | — | 6 | 9 | 15 | 40.0% | 3 | 5 | 8 | 37.5% | 1 | 2 | 3 | 33.3% |
Seasons are aligned by the age each player spent most of that calendar year. Detailed serve and return statistics available for 148/152 of Matteo Arnaldi's and 25/26 of Lukas Klein'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 | Matteo Arnaldi | Lukas Klein | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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% | |
| 21 | 2022 | 1/1 | 2.0 | 2.0 | 62.5% | 62.9% | 42.9% | 57.1% | 0.0% | 55.4% | 22.9% | — | —/— | — | — | — | — | — | — | — | — | — |
| 22 | 2023 | 31/31 | 5.5 | 3.3 | 57.5% | 69.7% | 53.7% | 65.7% | 47.7% | 63.0% | 37.6% | — | —/— | — | — | — | — | — | — | — | — | — |
| 23 | 2024 | 50/52 | 7.3 | 3.4 | 56.3% | 71.3% | 49.7% | 57.5% | 42.7% | 61.7% | 37.8% | 2021 | 5/6 | 2.8 | 3.6 | 63.4% | 68.5% | 46.9% | 57.7% | 38.8% | 61.1% | 36.3% |
| 24 | 2025 | 44/44 | 6.6 | 3.2 | 56.5% | 71.8% | 52.0% | 63.9% | 33.3% | 63.4% | 34.5% | 2022 | 1/1 | 12.0 | 6.0 | 68.1% | 68.4% | 63.0% | 45.5% | 28.6% | 66.7% | 36.0% |
| 25 | 2026 | 22/24 | 6.2 | 4.1 | 59.7% | 68.6% | 44.2% | 56.0% | 39.2% | 58.3% | 35.6% | 2023 | 1/1 | 4.0 | 0.0 | 59.4% | 57.9% | 57.7% | 57.1% | 0.0% | 57.8% | 29.3% |
| 26 | — | —/— | — | — | — | — | — | — | — | — | — | 2024 | 17/17 | 7.8 | 3.3 | 64.6% | 74.3% | 54.9% | 57.0% | 33.5% | 67.3% | 35.1% |
| 27 | — | —/— | — | — | — | — | — | — | — | — | — | 2025 | 1/1 | 11.0 | 4.0 | 59.0% | 70.0% | 55.0% | 50.0% | 40.0% | 64.0% | 39.0% |
| Career | — | 148/152 | 6.5 | 3.4 | 57.1% | 70.7% | 50.4% | 60.9% | 40.1% | 61.9% | 36.4% | — | 25/26 | 6.9 | 3.4 | 64.1% | 72.1% | 53.8% | 56.4% | 33.3% | 65.5% | 35.3% |
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 | Matteo Arnaldi | Lukas Klein | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| 21 | 2022 | 1519 | 106.5 | +0.69 | +2.40 | 0.513 | 40.4% | — | — | — | 0.0% | -3.50 | — | — | — | -0.04 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 2023 | 1824 | 138.7 | -0.01 | +1.19 | 1.018 | 50.8% | -79 | -85 | — | 51.8% | +0.04 | 7–6 (54%) | 10–4 (71%) | — | +0.09 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 23 | 2024 | 1809 | 152.7 | -1.74 | +1.60 | 0.987 | 49.8% | +10 | -7 | -192 | 52.2% | +0.01 | 9–12 (43%) | 14–12 (54%) | — | +0.02 | 2021 | 1561 | 110.3 | +0.25 | -1.57 | 0.933 | 48.8% | — | +12 | — | 42.9% | -0.43 | 0–2 | 1–1 | — | +0.01 |
| 24 | 2025 | 1741 | 149.1 | -0.37 | -0.41 | 0.942 | 49.3% | +6 | +95 | — | 47.0% | -0.19 | 8–10 (44%) | 12–7 (63%) | — | -1.38 | 2022 | 1560 | 105.6 | -1.45 | -1.49 | 1.079 | 49.7% | — | — | — | 40.0% | -1.00 | 0–1 | 1–0 | — | +0.12 |
| 25 | 2026 | 1701 | 125.1 | -3.79 | -0.04 | 0.855 | 47.1% | -57 | +199 | — | 42.6% | -0.71 | 6–5 (55%) | 8–8 (50%) | — | +0.37 | 2023 | 1560 | 107.4 | +1.15 | -1.85 | 0.695 | 44.3% | — | — | — | 0.0% | -3.00 | — | — | — | -0.08 |
| 26 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2024 | 1692 | 127.5 | +1.62 | +0.01 | 1.073 | 50.6% | +20 | -109 | — | 52.1% | +0.15 | 3–7 (30%) | 9–7 (56%) | — | -0.34 |
| 27 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2025 | 1621 | 113.5 | -0.48 | +0.92 | 1.083 | 51.0% | — | — | — | 25.0% | -0.25 | — | 0–1 | — | -0.23 |
| 28 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2026 | 1621 | 101.5 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 1906 | 146.5 | -1.26 | +0.68 | 0.955 | 49.4% | -14 | +42 | -192 | 48.8% | -0.18 | 30–33 (48%) | 44–31 (59%) | 102.5 | -0.63 | — | 1737 | 119.7 | +1.12 | -0.40 | 1.024 | 50.0% | +20 | -64 | — | 46.6% | -0.15 | 3–10 (23%) | 11–9 (55%) | 98.1 | -2.00 |
Each player's five most-played main-draw opponents. The current matchup is highlighted when it appears in a player's top five.
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Andrey Rublev | 2 | 3 | 5 | Jan 19, 2026 | H2H |
| Lorenzo Musetti | 0 | 4 | 4 | Jul 27, 2026 | H2H |
| Jaume Munar | 2 | 2 | 4 | May 6, 2026 | H2H |
| Alejandro Davidovich Fokina | 2 | 2 | 4 | Oct 4, 2025 | H2H |
| Daniil Medvedev | 0 | 4 | 4 | Oct 7, 2024 | H2H |
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| James Duckworth | 1 | 1 | 2 | Nov 7, 2024 | H2H |
| Sebastian Korda | 0 | 1 | 1 | Jan 14, 2025 | H2H |
| Jiri Lehecka | 0 | 1 | 1 | Nov 9, 2024 | H2H |
| Tomas Martin Etcheverry | 1 | 0 | 1 | Nov 8, 2024 | H2H |
| Nicolas Jarry | 0 | 1 | 1 | Sep 22, 2024 | H2H |