H2H data updated: 2026-09-02 00:00 UTC
Sumit Nagal holds a 1–0 lead over Lukas Klein in their ATP head-to-head. Across 1 main-draw meeting, Sumit Nagal leads 1–0 on clay. Most recently, Sumit Nagal won the 2024 Austrian Open Kitzbühel first round 6-4 1-6 7-6(3).
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| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Sumit Nagal | 6-4 1-6 7-6(3) | Lukas Klein | Match data | Jul 24, 2024* | R32 | Austrian Open Kitzbühel | ATP 250 | Clay |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lukas Klein | #288 | #109 | 544 | 1,736 | 10 | 16 | 38.5% | 0 | 0 | 0 | 0 | 0 | 0 |
| Sumit Nagal | #236 | #68 | 779 | 1,641 | 9 | 35 | 20.5% | 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 | Lukas Klein | Sumit Nagal | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 20 | — | — | — | — | — | — | — | 2018 | 0–1 | 0.0% | #340 | 1,450 | 0 | 0 |
| 21 | — | — | — | — | — | — | — | 2019 | 0–2 | 0.0% | #130 | 1,543 | 0 | 0 |
| 22 | — | — | — | — | — | — | — | 2020 | 1–4 | 20.0% | #136 | 1,564 | 0 | 0 |
| 23 | 2021 | 2–4 | 33.3% | #258 | 1,560 | 0 | 0 | 2021 | 3–7 | 30.0% | #222 | 1,576 | 0 | 0 |
| 24 | 2022 | 0–1 | 0.0% | #136 | 1,559 | 0 | 0 | — | — | — | — | — | — | — |
| 25 | 2023 | 0–1 | 0.0% | #170 | 1,559 | 0 | 0 | 2023 | 0–1 | 0.0% | #138 | 1,507 | 0 | 0 |
| 26 | 2024 | 8–9 | 47.1% | #136 | 1,692 | 0 | 0 | 2024 | 5–16 | 23.8% | #98 | 1,537 | 0 | 0 |
| 27 | 2025 | 0–1 | 0.0% | #142 | 1,621 | 0 | 0 | 2025 | 0–3 | 0.0% | #277 | 1,530 | 0 | 0 |
| 28 | — | — | — | — | — | — | — | 2026 | 0–1 | 0.0% | #236 | 1,504 | 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 | Lukas Klein | Sumit Nagal | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 % | |||
| 20 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2018 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 21 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2019 | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 22 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2020 | 1 | 3 | 4 | 25.0% | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 23 | 2021 | 0 | 1 | 1 | 0.0% | 1 | 2 | 3 | 33.3% | 1 | 1 | 2 | 50.0% | 2021 | 1 | 3 | 4 | 25.0% | 2 | 4 | 6 | 33.3% | — | — | — | — |
| 24 | 2022 | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 25 | 2023 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | 2023 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 26 | 2024 | 6 | 6 | 12 | 50.0% | 2 | 3 | 5 | 40.0% | — | — | — | — | 2024 | 1 | 8 | 9 | 11.1% | 4 | 7 | 11 | 36.4% | 0 | 1 | 1 | 0.0% |
| 27 | 2025 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | 2025 | 0 | 2 | 2 | 0.0% | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 28 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2026 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — |
| Career | — | 6 | 9 | 15 | 40.0% | 3 | 5 | 8 | 37.5% | 1 | 2 | 3 | 33.3% | — | 3 | 19 | 22 | 13.6% | 6 | 15 | 21 | 28.6% | 0 | 1 | 1 | 0.0% |
Seasons are aligned by the age each player spent most of that calendar year. Detailed serve and return statistics available for 25/26 of Lukas Klein's and 41/44 of Sumit Nagal'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 | Lukas Klein | Sumit Nagal | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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% | |
| 20 | — | —/— | — | — | — | — | — | — | — | — | — | 2018 | 1/1 | 2.0 | 3.0 | 55.2% | 48.6% | 50.0% | 50.0% | 50.0% | 49.3% | 31.4% |
| 21 | — | —/— | — | — | — | — | — | — | — | — | — | 2019 | 2/2 | 1.0 | 4.0 | 61.5% | 57.0% | 46.2% | 53.1% | 36.5% | 52.9% | 35.0% |
| 22 | — | —/— | — | — | — | — | — | — | — | — | — | 2020 | 5/5 | 1.4 | 3.4 | 68.8% | 64.1% | 41.7% | 51.0% | 29.6% | 57.0% | 35.2% |
| 23 | 2021 | 5/6 | 2.8 | 3.6 | 63.4% | 68.5% | 46.9% | 57.7% | 38.8% | 61.1% | 36.3% | 2021 | 8/10 | 1.1 | 2.8 | 75.4% | 55.7% | 48.8% | 43.6% | 30.5% | 54.7% | 37.6% |
| 24 | 2022 | 1/1 | 12.0 | 6.0 | 68.1% | 68.4% | 63.0% | 45.5% | 28.6% | 66.7% | 36.0% | — | —/— | — | — | — | — | — | — | — | — | — |
| 25 | 2023 | 1/1 | 4.0 | 0.0 | 59.4% | 57.9% | 57.7% | 57.1% | 0.0% | 57.8% | 29.3% | 2023 | 1/1 | 3.0 | 2.0 | 72.9% | 68.6% | 57.7% | 71.4% | 33.3% | 65.6% | 28.1% |
| 26 | 2024 | 17/17 | 7.8 | 3.3 | 64.6% | 74.3% | 54.9% | 57.0% | 33.5% | 67.3% | 35.1% | 2024 | 20/21 | 1.8 | 1.9 | 68.8% | 60.9% | 53.5% | 58.7% | 41.3% | 58.5% | 34.3% |
| 27 | 2025 | 1/1 | 11.0 | 4.0 | 59.0% | 70.0% | 55.0% | 50.0% | 40.0% | 64.0% | 39.0% | 2025 | 3/3 | 0.3 | 3.7 | 67.3% | 60.0% | 32.7% | 50.3% | 30.7% | 50.7% | 36.0% |
| 28 | — | —/— | — | — | — | — | — | — | — | — | — | 2026 | 1/1 | 0.0 | 1.0 | 74.0% | 57.0% | 46.0% | 60.0% | 0.0% | 54.0% | 35.0% |
| Career | — | 25/26 | 6.9 | 3.4 | 64.1% | 72.1% | 53.8% | 56.4% | 33.3% | 65.5% | 35.3% | — | 41/44 | 1.4 | 2.5 | 69.5% | 59.8% | 49.1% | 54.1% | 35.7% | 56.6% | 35.0% |
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 | Lukas Klein | Sumit Nagal | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| 16 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2014 | 1483 | 92.6 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 17 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2015 | 1475 | 96.7 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2018 | 1451 | 103.4 | -0.29 | -2.23 | 0.618 | 41.5% | — | — | — | 0.0% | -3.00 | — | — | — | +0.26 |
| 21 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2019 | 1543 | 124.3 | -0.61 | +3.36 | 0.744 | 43.7% | — | — | — | 16.7% | -2.33 | — | 0–1 | — | -0.24 |
| 22 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2020 | 1564 | 119.4 | -1.81 | -0.59 | 0.818 | 45.9% | +14 | — | — | 33.3% | -1.33 | 0–2 | 1–1 | — | -0.09 |
| 23 | 2021 | 1561 | 110.3 | +0.25 | -1.57 | 0.933 | 48.8% | — | +12 | — | 42.9% | -0.43 | 0–2 | 1–1 | — | +0.01 | 2021 | 1577 | 118.0 | -2.98 | -0.33 | 0.831 | 46.5% | -35 | +49 | — | 33.3% | -1.38 | 1–2 (33%) | 0–1 | — | +0.30 |
| 24 | 2022 | 1560 | 105.6 | -1.45 | -1.49 | 1.079 | 49.7% | — | — | — | 40.0% | -1.00 | 0–1 | 1–0 | — | +0.12 | 2022 | 1550 | 101.8 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 25 | 2023 | 1560 | 107.4 | +1.15 | -1.85 | 0.695 | 44.3% | — | — | — | 0.0% | -3.00 | — | — | — | -0.08 | 2023 | 1508 | 105.9 | -2.33 | -4.01 | 0.817 | 47.6% | — | — | — | 33.3% | -0.67 | 0–1 | — | — | -0.14 |
| 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 | 2024 | 1538 | 128.5 | -3.74 | -1.32 | 0.826 | 46.7% | -46 | +117 | — | 31.5% | -1.13 | 3–4 (43%) | 2–3 (40%) | — | -0.68 |
| 27 | 2025 | 1621 | 113.5 | -0.48 | +0.92 | 1.083 | 51.0% | — | — | — | 25.0% | -0.25 | — | 0–1 | — | -0.23 | 2025 | 1530 | 114.0 | -1.97 | -1.06 | 0.730 | 43.7% | — | — | — | 12.5% | -2.63 | 0–1 | 1–0 | — | -0.44 |
| 28 | 2026 | 1621 | 101.5 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2026 | 1505 | 103.5 | +2.82 | -1.18 | 0.761 | 44.0% | — | — | — | 0.0% | -4.00 | — | — | — | -0.13 |
| Career | — | 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 | — | 1642 | 124.3 | -2.80 | -0.87 | 0.806 | 46.0% | -29 | +93 | — | 28.9% | -1.45 | 4–10 (29%) | 4–6 (40%) | 95.0 | -2.64 |
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 |
|---|---|---|---|---|---|
| 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 |
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Corentin Moutet | 1 | 3 | 4 | Feb 13, 2025 | H2H |
| Miomir Kecmanovic | 0 | 2 | 2 | Jul 3, 2024 | H2H |
| Lorenzo Sonego | 0 | 2 | 2 | Apr 5, 2024 | H2H |
| Ricardas Berankis | 0 | 2 | 2 | Feb 10, 2021 | H2H |
| Francisco Cerundolo | 0 | 1 | 1 | Apr 13, 2026 | H2H |