H2H data updated: 2026-09-03 00:00 UTC
Compare the head-to-head record, career totals, season-by-season performance, and match log for Ramkumar Ramanathan vs Bradley Klahn.
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| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Ramkumar Ramanathan | 6-7(6) 7-6(3) 6-2 | Bradley Klahn | Match data | Jan 15, 2018 | Q1 | Australian Open | Grand Slam | Hard |
1 qualifying meeting shown in the table; qualifying is excluded from the H2H score. 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ramkumar Ramanathan | #1,157 | #111 | 495 | 1,640 | 14 | 27 | 34.1% | 0 | 0 | 0 | 0 | 0 | 0 |
| Bradley Klahn | #1,096 | #63 | 731 | 1,734 | 13 | 43 | 23.2% | 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 | Ramkumar Ramanathan | Bradley Klahn | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 19 | 2014 | 1–1 | 50.0% | #241 | 1,543 | 0 | 0 | 2010 | 0–1 | 0.0% | — | 1,499 | 0 | 0 |
| 20 | 2015 | 0–2 | 0.0% | #248 | 1,510 | 0 | 0 | 2011 | 0–1 | 0.0% | — | 1,525 | 0 | 0 |
| 21 | 2016 | 2–2 | 50.0% | #227 | 1,475 | 0 | 0 | 2012 | 1–2 | 33.3% | #248 | 1,638 | 0 | 0 |
| 22 | 2017 | 3–4 | 42.9% | #148 | 1,567 | 0 | 0 | 2013 | 1–3 | 25.0% | #97 | 1,602 | 0 | 0 |
| 23 | 2018 | 6–5 | 54.5% | #132 | 1,618 | 0 | 0 | 2014 | 2–11 | 15.4% | #148 | 1,549 | 0 | 0 |
| 24 | 2019 | 2–4 | 33.3% | #174 | 1,561 | 0 | 0 | — | — | — | — | — | — | — |
| 25 | 2020 | 0–1 | 0.0% | #190 | 1,513 | 0 | 0 | — | — | — | — | — | — | — |
| 26 | 2021 | 0–3 | 0.0% | #184 | 1,526 | 0 | 0 | — | — | — | — | — | — | — |
| 27 | 2022 | 0–3 | 0.0% | #434 | 1,497 | 0 | 0 | 2018 | 5–8 | 38.5% | #76 | 1,708 | 0 | 0 |
| 28 | 2023 | 0–1 | 0.0% | #440 | 1,503 | 0 | 0 | 2019 | 4–14 | 22.2% | #135 | 1,645 | 0 | 0 |
| 29 | 2024 | 0–1 | 0.0% | #395 | 1,511 | 0 | 0 | 2020 | 0–1 | 0.0% | #149 | 1,570 | 0 | 0 |
| 31 | — | — | — | — | — | — | — | 2022 | 0–1 | 0.0% | #873 | 1,485 | 0 | 0 |
| 32 | — | — | — | — | — | — | — | 2023 | 0–1 | 0.0% | #877 | 1,479 | 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 | Ramkumar Ramanathan | Bradley Klahn | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 % | |||
| 19 | 2014 | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | 2010 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 20 | 2015 | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — | 2011 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 21 | 2016 | 2 | 2 | 4 | 50.0% | — | — | — | — | — | — | — | — | 2012 | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — |
| 22 | 2017 | 1 | 3 | 4 | 25.0% | — | — | — | — | 2 | 1 | 3 | 66.7% | 2013 | 1 | 2 | 3 | 33.3% | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 23 | 2018 | 2 | 4 | 6 | 33.3% | — | — | — | — | 4 | 1 | 5 | 80.0% | 2014 | 2 | 7 | 9 | 22.2% | 0 | 1 | 1 | 0.0% | 0 | 3 | 3 | 0.0% |
| 24 | 2019 | 1 | 3 | 4 | 25.0% | — | — | — | — | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 25 | 2020 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | 2021 | 0 | 3 | 3 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 27 | 2022 | 0 | 3 | 3 | 0.0% | — | — | — | — | — | — | — | — | 2018 | 4 | 7 | 11 | 36.4% | — | — | — | — | 1 | 1 | 2 | 50.0% |
| 28 | 2023 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | 2019 | 3 | 9 | 12 | 25.0% | 0 | 2 | 2 | 0.0% | 1 | 3 | 4 | 25.0% |
| 29 | 2024 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | 2020 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 31 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2022 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 32 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2023 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| Career | — | 7 | 24 | 31 | 22.6% | — | — | — | — | 7 | 3 | 10 | 70.0% | — | 11 | 32 | 43 | 25.6% | 0 | 4 | 4 | 0.0% | 2 | 7 | 9 | 22.2% |
Seasons are aligned by the age each player spent most of that calendar year. 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 | Ramkumar Ramanathan | Bradley Klahn | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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% | |
| 19 | 2014 | 2/2 | 4.5 | 7.0 | 50.4% | 66.9% | 37.4% | 53.5% | 55.6% | 52.2% | 37.1% | 2010 | 1/1 | 6.0 | 7.0 | 69.5% | 69.2% | 40.0% | 56.3% | 27.3% | 60.3% | 31.3% |
| 20 | 2015 | 2/2 | 7.0 | 3.0 | 48.3% | 73.5% | 33.7% | 53.0% | 0.0% | 52.9% | 27.2% | 2011 | 1/1 | 1.0 | 4.0 | 58.0% | 62.1% | 42.9% | 40.0% | 0.0% | 54.0% | 22.4% |
| 21 | 2016 | 4/4 | 5.3 | 2.3 | 63.5% | 73.0% | 54.6% | 34.2% | 44.6% | 66.3% | 35.7% | 2012 | 3/3 | 7.3 | 4.3 | 64.4% | 62.3% | 41.6% | 60.4% | 44.4% | 55.0% | 37.4% |
| 22 | 2017 | 7/7 | 8.7 | 4.1 | 56.8% | 73.7% | 51.2% | 71.7% | 32.3% | 63.7% | 33.8% | 2013 | 4/4 | 8.0 | 2.3 | 66.9% | 73.3% | 51.5% | 25.0% | 33.5% | 65.9% | 33.7% |
| 23 | 2018 | 11/11 | 7.1 | 3.8 | 59.1% | 74.7% | 49.1% | 67.1% | 38.1% | 64.6% | 35.3% | 2014 | 13/13 | 6.7 | 5.5 | 58.6% | 66.8% | 46.4% | 53.4% | 33.7% | 58.4% | 32.0% |
| 24 | 2019 | 6/6 | 8.8 | 4.7 | 65.1% | 73.0% | 43.9% | 46.5% | 31.4% | 62.9% | 33.6% | — | —/— | — | — | — | — | — | — | — | — | — |
| 25 | 2020 | 1/1 | 17.0 | 6.0 | 56.6% | 76.7% | 43.5% | 66.7% | 20.0% | 62.3% | 33.7% | — | —/— | — | — | — | — | — | — | — | — | — |
| 26 | 2021 | 3/3 | 9.7 | 5.0 | 56.5% | 79.9% | 42.6% | 38.9% | 16.7% | 63.6% | 28.0% | — | —/— | — | — | — | — | — | — | — | — | — |
| 27 | 2022 | 3/3 | 8.0 | 4.7 | 65.2% | 72.9% | 48.7% | 64.4% | 30.4% | 63.6% | 31.1% | 2018 | 13/13 | 9.2 | 4.5 | 59.8% | 75.5% | 53.9% | 50.6% | 38.6% | 66.9% | 28.2% |
| 28 | 2023 | 1/1 | 11.0 | 6.0 | 45.7% | 78.6% | 46.0% | 42.9% | 27.3% | 60.9% | 36.9% | 2019 | 18/18 | 8.8 | 4.6 | 59.5% | 72.2% | 52.6% | 60.3% | 34.4% | 64.4% | 29.4% |
| 29 | 2024 | 1/1 | 8.0 | 8.0 | 60.0% | 69.2% | 42.3% | 50.0% | 0.0% | 58.5% | 21.7% | 2020 | 1/1 | 10.0 | 5.0 | 62.9% | 63.0% | 44.2% | 64.7% | 50.0% | 56.0% | 26.1% |
| 31 | — | —/— | — | — | — | — | — | — | — | — | — | 2022 | 1/1 | 6.0 | 3.0 | 52.2% | 58.3% | 54.5% | 50.0% | — | 56.5% | 20.0% |
| 32 | — | —/— | — | — | — | — | — | — | — | — | — | 2023 | 1/1 | 4.0 | 5.0 | 68.9% | 66.7% | 31.6% | 66.7% | 0.0% | 55.7% | 23.5% |
| Career | — | 41/41 | 7.9 | 4.3 | 59.0% | 74.0% | 47.0% | 57.0% | 32.0% | 62.7% | 33.4% | — | 56/56 | 7.9 | 4.6 | 60.4% | 70.5% | 49.9% | 53.5% | 34.0% | 62.5% | 30.1% |
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 | Ramkumar Ramanathan | Bradley Klahn | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| 17 | 2012 | 1483 | 95.2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 18 | 2013 | 1474 | 98.0 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 19 | 2014 | 1544 | 114.1 | -1.99 | -2.63 | 0.776 | 45.6% | — | — | — | 40.0% | -0.60 | 1–0 | — | — | -0.10 | 2010 | 1499 | 108.4 | -1.52 | +3.65 | 0.787 | 46.9% | — | — | — | 25.0% | -1.25 | — | — | — | -0.11 |
| 20 | 2015 | 1511 | 101.2 | -2.47 | -3.37 | 0.578 | 41.8% | — | — | — | 0.0% | -3.50 | — | — | — | +0.09 | 2011 | 1525 | 112.8 | +0.69 | +0.59 | 0.488 | 38.4% | — | — | — | 0.0% | -3.50 | — | — | — | -0.19 |
| 21 | 2016 | 1475 | 103.2 | +0.65 | -1.00 | 1.060 | 51.1% | +42 | — | — | 50.0% | +0.10 | 1–1 | 1–0 | — | +0.40 | 2012 | 1639 | 117.2 | -2.52 | -0.18 | 0.831 | 46.8% | +35 | — | — | 36.4% | -1.18 | 1–1 | — | — | +0.09 |
| 22 | 2017 | 1567 | 117.9 | +0.61 | -1.11 | 0.930 | 48.9% | -29 | — | +102 | 47.1% | -0.12 | 1–2 (33%) | 1–2 (33%) | — | +0.45 | 2013 | 1603 | 112.5 | -1.91 | -0.65 | 0.991 | 48.3% | +55 | — | — | 33.3% | -0.67 | — | 2–3 (40%) | — | +0.13 |
| 23 | 2018 | 1619 | 118.2 | -0.54 | -1.31 | 0.996 | 49.9% | -46 | — | +123 | 54.2% | +0.21 | 1–1 | 1–0 | — | +0.39 | 2014 | 1550 | 122.4 | -3.31 | -2.26 | 0.770 | 45.5% | +73 | — | -31 | 30.0% | -1.58 | 2–4 (33%) | 6–2 (75%) | — | -0.32 |
| 24 | 2019 | 1562 | 112.1 | -1.02 | -0.81 | 0.907 | 48.1% | -48 | — | — | 37.5% | -0.88 | 2–2 (50%) | 2–2 (50%) | — | +0.49 | 2015 | 1548 | 102.5 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 25 | 2020 | 1513 | 95.2 | -2.03 | -2.56 | 0.893 | 48.8% | — | — | — | 33.3% | -0.33 | 0–1 | — | — | +0.05 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | 2021 | 1527 | 111.0 | -2.40 | -1.77 | 0.771 | 44.9% | -26 | — | — | 14.3% | -2.14 | 0–1 | 1–1 | — | +0.12 | 2017 | 1549 | 103.9 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 27 | 2022 | 1497 | 107.8 | -1.44 | -1.57 | 0.853 | 47.2% | -9 | — | — | 25.0% | -1.00 | 0–2 | 0–2 | — | +0.69 | 2018 | 1709 | 132.3 | +1.07 | -2.48 | 0.852 | 48.3% | -22 | — | — | 38.2% | -0.56 | 2–2 (50%) | 5–5 (50%) | — | -0.18 |
| 28 | 2023 | 1503 | 101.4 | -0.17 | -3.99 | 0.943 | 48.2% | — | — | — | 33.3% | -0.67 | 0–1 | — | — | +0.09 | 2019 | 1646 | 123.8 | -0.08 | -4.65 | 0.825 | 47.6% | +21 | — | -93 | 28.3% | -1.00 | 1–2 (33%) | 4–6 (40%) | — | 0.00 |
| 29 | 2024 | 1512 | 101.4 | -0.54 | -4.11 | 0.522 | 40.8% | — | — | — | 0.0% | -3.00 | — | 0–1 | — | +0.06 | 2020 | 1570 | 96.9 | -1.18 | -3.05 | 0.594 | 43.1% | — | — | — | 25.0% | -2.50 | — | — | — | +0.34 |
| 31 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2022 | 1485 | 106.5 | -0.77 | -0.68 | 0.460 | 42.1% | — | — | — | 0.0% | -3.00 | — | — | — | -0.01 |
| 32 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2023 | 1480 | 104.5 | +0.15 | -2.16 | 0.532 | 41.1% | — | — | — | 0.0% | -3.00 | — | — | — | +0.02 |
| Career | — | 1640 | 114.6 | -0.69 | -1.55 | 0.895 | 48.1% | -22 | — | +115 | 39.4% | -0.60 | 6–11 (35%) | 6–8 (43%) | 97.7 | +6.66 | — | 1734 | 124.5 | -0.86 | -2.68 | 0.801 | 46.8% | +25 | — | -66 | 30.6% | -1.17 | 6–9 (40%) | 17–16 (52%) | 101.2 | -0.41 |
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 |
|---|---|---|---|---|---|
| Steve Johnson | 0 | 2 | 2 | Aug 4, 2021 | H2H |
| Marcel Granollers | 1 | 1 | 2 | Jan 3, 2019 | H2H |
| Aleksandr Shevchenko | 0 | 1 | 1 | Oct 4, 2024 | H2H |
| Pedro Martinez | 0 | 1 | 1 | Jan 5, 2023 | H2H |
| Rio Noguchi | 0 | 1 | 1 | Oct 6, 2022 | H2H |
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| John Isner | 0 | 3 | 3 | Oct 19, 2018 | H2H |
| Alex de Minaur | 0 | 2 | 2 | Jul 26, 2019 | H2H |
| Marius Copil | 2 | 0 | 2 | Jul 25, 2019 | H2H |
| Sam Querrey | 0 | 2 | 2 | Jun 25, 2014 | H2H |
| Michael Mmoh | 0 | 1 | 1 | Aug 2, 2023 | H2H |