H2H data updated: 2026-10-08 00:00 UTC
Compare the head-to-head record, career totals, season-by-season performance, and match log for Chun-Hsin Tseng vs Nicolas Mejia.
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| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Nicolas Mejia | 6-4 | Chun-Hsin Tseng | Match data | Oct 5, 2026 | Q1 | Shanghai Masters | Masters 1000 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chun-Hsin Tseng | #225 | #83 | 648 | 1,611 | 9 | 30 | 23.1% | 0 | 0 | 0 | 0 | 0 | 0 |
| Nicolas Mejia | #119 | #115 | 548 | 1,601 | 2 | 6 | 25.0% | 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 | Chun-Hsin Tseng | Nicolas Mejia | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 16 | 2018 | 0–1 | 0.0% | — | 1,494 | 0 | 0 | — | — | — | — | — | — | — |
| 17 | 2019 | 0–1 | 0.0% | #305 | 1,472 | 0 | 0 | — | — | — | — | — | — | — |
| 20 | 2022 | 3–8 | 27.3% | #115 | 1,511 | 0 | 0 | — | — | — | — | — | — | — |
| 21 | 2023 | 1–5 | 16.7% | #298 | 1,513 | 0 | 0 | 2021 | 0–1 | 0.0% | #286 | 1,513 | 0 | 0 |
| 22 | 2024 | 1–2 | 33.3% | #119 | 1,485 | 0 | 0 | — | — | — | — | — | — | — |
| 23 | 2025 | 4–12 | 25.0% | #124 | 1,483 | 0 | 0 | — | — | — | — | — | — | — |
| 24 | 2026 | 0–1 | 0.0% | #225 | 1,416 | 0 | 0 | 2024 | 0–1 | 0.0% | #219 | 1,467 | 0 | 0 |
| 25 | — | — | — | — | — | — | — | 2025 | 0–1 | 0.0% | #170 | 1,479 | 0 | 0 |
| 26 | — | — | — | — | — | — | — | 2026 | 2–3 | 40.0% | #119 | 1,599 | 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 | Chun-Hsin Tseng | Nicolas Mejia | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 % | |||
| 16 | 2018 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 17 | 2019 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 2022 | 3 | 6 | 9 | 33.3% | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 21 | 2023 | 1 | 4 | 5 | 20.0% | 0 | 1 | 1 | 0.0% | — | — | — | — | 2021 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 22 | 2024 | 0 | 1 | 1 | 0.0% | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 23 | 2025 | 1 | 4 | 5 | 20.0% | 3 | 6 | 9 | 33.3% | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 24 | 2026 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | 2024 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 25 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2025 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 26 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2026 | 1 | 2 | 3 | 33.3% | — | — | — | — | 1 | 1 | 2 | 50.0% |
| Career | — | 5 | 18 | 23 | 21.7% | 4 | 9 | 13 | 30.8% | 0 | 3 | 3 | 0.0% | — | 1 | 5 | 6 | 16.7% | — | — | — | — | 1 | 1 | 2 | 50.0% |
Seasons are aligned by the age each player spent most of that calendar year. Detailed serve and return statistics available for 39/41 of Chun-Hsin Tseng's and 8/9 of Nicolas Mejia'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 | Chun-Hsin Tseng | Nicolas Mejia | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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% | |
| 16 | 2018 | 1/1 | 3.0 | 6.0 | 54.9% | 70.0% | 46.3% | 40.0% | 50.0% | 59.3% | 33.7% | — | —/— | — | — | — | — | — | — | — | — | — |
| 17 | 2019 | 1/1 | 7.0 | 4.0 | 61.5% | 64.3% | 40.0% | 66.7% | 33.3% | 54.9% | 35.9% | — | —/— | — | — | — | — | — | — | — | — | — |
| 20 | 2022 | 11/11 | 2.5 | 4.6 | 56.6% | 64.8% | 48.5% | 52.4% | 30.5% | 57.7% | 35.0% | — | —/— | — | — | — | — | — | — | — | — | — |
| 21 | 2023 | 6/6 | 2.8 | 2.8 | 63.8% | 62.3% | 48.3% | 64.2% | 28.7% | 57.9% | 28.5% | 2021 | 1/1 | 3.0 | 3.0 | 63.6% | 68.6% | 30.0% | 20.0% | 0.0% | 54.5% | 30.2% |
| 22 | 2024 | 3/3 | 2.7 | 1.3 | 55.3% | 64.3% | 53.9% | 39.3% | 48.8% | 59.3% | 43.3% | — | —/— | — | — | — | — | — | — | — | — | — |
| 23 | 2025 | 16/16 | 4.0 | 2.8 | 57.9% | 65.9% | 49.3% | 57.8% | 39.5% | 59.1% | 35.3% | — | —/— | — | — | — | — | — | — | — | — | — |
| 24 | 2026 | 1/3 | 0.0 | 4.0 | 71.0% | 63.0% | 25.0% | 57.0% | 0.0% | 52.0% | 31.0% | 2024 | 1/1 | 1.0 | 2.0 | 62.5% | 55.0% | 29.2% | 37.5% | 50.0% | 45.3% | 41.8% |
| 25 | — | —/— | — | — | — | — | — | — | — | — | — | 2025 | 1/1 | 3.0 | 1.0 | 57.0% | 58.0% | 48.0% | 33.0% | 0.0% | 54.0% | 25.0% |
| 26 | — | —/— | — | — | — | — | — | — | — | — | — | 2026 | 5/6 | 5.2 | 2.6 | 61.4% | 66.2% | 50.6% | 57.6% | 34.4% | 60.0% | 34.6% |
| Career | — | 39/41 | 3.2 | 3.4 | 58.6% | 64.9% | 48.3% | 55.6% | 35.1% | 58.2% | 34.7% | — | 8/9 | 4.1 | 2.4 | 61.3% | 64.1% | 45.0% | 47.3% | 27.8% | 56.7% | 33.7% |
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 | Chun-Hsin Tseng | Nicolas Mejia | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 2018 | 1495 | 105.9 | -0.89 | +0.47 | 0.829 | 46.7% | — | — | — | 33.3% | -0.67 | 0–1 | — | — | -0.04 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 17 | 2019 | 1473 | 105.6 | -1.96 | -1.56 | 0.797 | 46.2% | — | — | — | 0.0% | -2.00 | — | — | — | -0.03 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 2022 | 1512 | 115.9 | -3.31 | -0.25 | 0.827 | 46.2% | +1 | — | — | 25.0% | -1.75 | 1–2 (33%) | 2–4 (33%) | 97.6 | +0.73 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 21 | 2023 | 1513 | 106.3 | -3.48 | -2.03 | 0.677 | 44.3% | +11 | — | — | 25.0% | -1.44 | 1–1 | 1–4 (20%) | — | +0.11 | 2021 | 1514 | 98.9 | -0.79 | -2.03 | 0.664 | 42.6% | — | — | — | 0.0% | -3.50 | — | — | — | +0.32 |
| 22 | 2024 | 1486 | 108.9 | -1.12 | -0.66 | 1.063 | 51.7% | — | — | — | 50.0% | +0.75 | — | — | — | +0.29 | 2022 | 1507 | 103.6 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 23 | 2025 | 1483 | 115.0 | -3.57 | -1.43 | 0.863 | 47.5% | -30 | +122 | — | 30.8% | -1.10 | 1–3 (25%) | 3–8 (27%) | 94.6 | +0.28 | 2023 | 1496 | 102.5 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 24 | 2026 | 1417 | 96.1 | -0.86 | -2.21 | 0.646 | 42.0% | — | — | — | 0.0% | -3.50 | — | — | — | -0.02 | 2024 | 1467 | 109.6 | +0.60 | -2.67 | 0.764 | 43.5% | — | — | — | 0.0% | -3.00 | — | 0–1 | — | -0.13 |
| 25 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2025 | 1479 | 103.8 | -2.89 | -3.46 | 0.543 | 41.0% | — | — | — | 0.0% | -3.50 | — | — | — | +0.11 |
| 26 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2026 | 1599 | 115.6 | -0.66 | -1.84 | 0.865 | 47.6% | -27 | — | — | 40.0% | -0.87 | 1–0 | 2–3 (40%) | — | +0.35 |
| Career | — | 1611 | 113.7 | -3.11 | -1.10 | 0.830 | 46.8% | -5 | +122 | — | 27.7% | -1.33 | 3–7 (30%) | 6–16 (27%) | 91.6 | +3.38 | — | 1602 | 113.3 | -0.80 | -2.17 | 0.780 | 45.6% | -27 | — | — | 28.6% | -1.57 | 1–0 | 2–4 (33%) | — | +8.13 |
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 |
|---|---|---|---|---|---|
| Sebastian Baez | 0 | 2 | 2 | Mar 5, 2026 | H2H |
| Christopher O'Connell | 1 | 1 | 2 | Jul 29, 2025 | H2H |
| Alexei Popyrin | 0 | 2 | 2 | Jan 18, 2023 | H2H |
| Joao Sousa | 0 | 2 | 2 | May 24, 2022 | H2H |
| Zizou Bergs | 0 | 1 | 1 | Aug 26, 2025 | H2H |
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Adam Walton | 0 | 1 | 1 | Aug 14, 2026 | H2H |
| Lorenzo Musetti | 0 | 1 | 1 | Aug 5, 2026 | H2H |
| Martin Landaluce | 1 | 0 | 1 | Aug 3, 2026 | H2H |
| Michael Zheng | 0 | 1 | 1 | Jul 1, 2026 | H2H |
| Adolfo Daniel Vallejo | 1 | 0 | 1 | Jun 29, 2026 | H2H |