H2H data updated: 2026-09-03 00:00 UTC

Stefan Koubek vs Horacio Zeballos

Compare the head-to-head record, career totals, season-by-season performance, and match log for Stefan Koubek vs Horacio Zeballos.

Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.

Stefan Koubek
AUT Age 49 Left-Handed 175 cm / 5'9"
H2H
0 – 0
0 main draw meetings
Horacio Zeballos
ARG Age 41 Left-Handed 188 cm / 6'2"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Horacio Zeballos #76 6-4 6-1 Stefan Koubek #140 Match data Sep 1, 2009* Q3 Q US Open Grand Slam 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.

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
Stefan Koubek #906 #20 1,143 1,796 195 235 45.3% 0 0 0 0 3 3
Horacio Zeballos #841 #39 1,027 1,877 87 131 39.9% 0 0 0 0 1 1

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 Stefan Koubek Horacio Zeballos
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
17 1994 0–1 0.0% #1219 1,485 0 0 — — — — — — —
19 1996 1–2 33.3% #311 1,482 0 0 — — — — — — —
20 1997 4–2 66.7% #125 1,543 0 0 — — — — — — —
21 1998 2–4 33.3% #93 1,533 0 0 — — — — — — —
22 1999 29–25 53.7% #46 1,681 0 1 — — — — — — —
23 2000 26–27 49.1% #54 1,625 0 2 — — — — — — —
24 2001 20–22 47.6% #63 1,697 0 2 2009 5–5 50.0% #45 1,613 0 0
25 2002 18–31 36.7% #54 1,578 0 2 2010 14–26 35.0% #110 1,595 0 0
26 2003 19–24 44.2% #53 1,648 0 3 2011 5–6 45.5% #109 1,598 0 0
27 2004 22–24 47.8% #60 1,757 0 3 2012 3–9 25.0% #85 1,591 0 0
28 2005 6–15 28.6% #182 1,570 0 3 2013 14–23 37.8% #56 1,587 0 1
29 2006 14–9 60.9% #80 1,693 0 3 2014 7–9 43.8% #123 1,633 0 1
30 2007 22–26 45.8% #47 1,762 0 3 2015 2–4 33.3% #124 1,645 0 1
31 2008 3–6 33.3% #192 1,704 0 3 2016 7–13 35.0% #71 1,670 0 1
32 2009 6–11 35.3% #135 1,638 0 3 2017 20–22 47.6% #66 1,759 0 1
33 2010 3–5 37.5% #131 1,632 0 3 2018 10–14 41.7% #173 1,721 0 1
34 2011 0–1 0.0% #647 1,602 0 3 — — — — — — —

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 Stefan Koubek Horacio Zeballos
Yr HardClayGrassCarpet Yr HardClayGrassCarpet
W L M Win % W L M Win % W L M Win % W L M Win % W L M Win % W L M Win % W L M Win % W L M Win %
17 1994 — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
19 1996 — — — — 1 2 3 33.3% — — — — — — — — — — — — — — — — — — — — — — — — —
20 1997 1 1 2 50.0% 3 1 4 75.0% — — — — — — — — — — — — — — — — — — — — — — — — —
21 1998 0 2 2 0.0% 2 2 4 50.0% — — — — — — — — — — — — — — — — — — — — — — — — —
22 1999 2 7 9 22.2% 25 13 38 65.8% 0 1 1 0.0% 2 4 6 33.3% — — — — — — — — — — — — — — — — —
23 2000 18 14 32 56.3% 7 10 17 41.2% 1 2 3 33.3% 0 1 1 0.0% — — — — — — — — — — — — — — — — —
24 2001 12 13 25 48.0% 8 7 15 53.3% 0 2 2 0.0% — — — — 2009 5 4 9 55.6% — — — — 0 1 1 0.0% — — — —
25 2002 8 17 25 32.0% 7 9 16 43.8% 3 3 6 50.0% 0 2 2 0.0% 2010 5 13 18 27.8% 8 11 19 42.1% 1 2 3 33.3% — — — —
26 2003 9 11 20 45.0% 6 9 15 40.0% 2 3 5 40.0% 2 1 3 66.7% 2011 0 1 1 0.0% 5 5 10 50.0% — — — — — — — —
27 2004 8 10 18 44.4% 10 11 21 47.6% 1 2 3 33.3% 3 1 4 75.0% 2012 0 2 2 0.0% 3 7 10 30.0% — — — — — — — —
28 2005 3 7 10 30.0% 3 7 10 30.0% 0 1 1 0.0% — — — — 2013 3 9 12 25.0% 11 13 24 45.8% 0 1 1 0.0% — — — —
29 2006 6 4 10 60.0% 4 4 8 50.0% — — — — 4 1 5 80.0% 2014 3 4 7 42.9% 4 5 9 44.4% — — — — — — — —
30 2007 15 15 30 50.0% 6 8 14 42.9% 0 2 2 0.0% 1 1 2 50.0% 2015 — — — — 2 3 5 40.0% 0 1 1 0.0% — — — —
31 2008 3 6 9 33.3% — — — — — — — — — — — — 2016 6 5 11 54.5% 1 5 6 16.7% 0 3 3 0.0% — — — —
32 2009 4 5 9 44.4% 1 4 5 20.0% 1 2 3 33.3% — — — — 2017 5 8 13 38.5% 15 12 27 55.6% 0 2 2 0.0% — — — —
33 2010 3 3 6 50.0% 0 1 1 0.0% 0 1 1 0.0% — — — — 2018 3 5 8 37.5% 6 8 14 42.9% 1 1 2 50.0% — — — —
34 2011 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
Career — 92 116 208 44.2% 83 89 172 48.3% 8 19 27 29.6% 12 11 23 52.2% — 30 51 81 37.0% 55 69 124 44.4% 2 11 13 15.4% — — — —

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 390/430 of Stefan Koubek's and 218/218 of Horacio Zeballos'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 Stefan Koubek Horacio Zeballos
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%
17 1994 1/1 0.0 1.0 76.1% 45.7% 18.2% 0.0% 28.6% 39.1% 37.7% — —/— — — — — — — — — —
19 1996 3/3 1.0 3.7 66.3% 48.8% 38.8% 48.3% 43.4% 45.6% 39.8% — —/— — — — — — — — — —
20 1997 5/6 3.2 3.2 61.8% 61.8% 57.4% 46.6% 51.3% 60.1% 47.7% — —/— — — — — — — — — —
21 1998 6/6 2.8 3.0 61.9% 64.4% 44.5% 49.8% 42.8% 56.9% 37.5% — —/— — — — — — — — — —
22 1999 46/54 2.6 2.3 58.6% 66.4% 52.1% 56.8% 40.4% 60.8% 39.5% — —/— — — — — — — — — —
23 2000 38/53 4.2 3.9 59.6% 67.7% 49.6% 52.4% 40.4% 60.2% 37.0% — —/— — — — — — — — — —
24 2001 38/42 3.5 3.4 58.2% 66.1% 50.6% 58.1% 43.5% 59.4% 36.3% 2009 10/10 6.8 2.7 65.2% 71.0% 57.0% 65.7% 54.8% 66.1% 32.9%
25 2002 39/49 3.5 3.7 58.9% 65.2% 48.6% 48.7% 40.1% 58.3% 37.2% 2010 40/40 5.8 2.2 63.1% 67.6% 47.7% 60.4% 40.6% 60.5% 32.0%
26 2003 43/43 2.7 2.8 60.0% 65.0% 51.0% 58.8% 39.9% 59.5% 38.5% 2011 11/11 6.0 2.7 61.9% 73.7% 49.3% 65.4% 44.9% 64.3% 34.0%
27 2004 45/46 3.6 3.0 63.1% 65.9% 50.1% 55.2% 39.2% 60.1% 37.6% 2012 12/12 5.5 2.8 62.0% 67.1% 51.1% 62.2% 33.6% 61.2% 33.9%
28 2005 21/21 4.3 3.7 60.1% 63.6% 48.3% 56.0% 42.7% 57.4% 36.9% 2013 37/37 5.6 2.7 62.6% 69.2% 49.1% 59.1% 36.2% 61.6% 30.6%
29 2006 22/23 3.5 3.3 55.8% 68.2% 51.8% 58.7% 40.8% 60.7% 39.0% 2014 16/16 4.0 1.8 59.1% 72.9% 52.7% 59.2% 36.6% 64.5% 30.5%
30 2007 48/48 4.0 2.7 59.2% 67.9% 52.4% 56.6% 46.6% 61.4% 37.4% 2015 6/6 7.2 2.8 62.6% 67.8% 44.1% 67.3% 35.5% 59.1% 31.0%
31 2008 9/9 4.6 3.6 58.6% 65.0% 42.6% 46.4% 40.7% 55.7% 34.1% 2016 20/20 6.2 3.1 60.1% 72.6% 51.9% 55.7% 34.3% 64.1% 28.4%
32 2009 17/17 3.8 3.1 54.3% 70.4% 50.5% 42.5% 38.1% 60.9% 36.2% 2017 42/42 5.8 2.2 64.1% 71.2% 54.7% 56.0% 37.5% 65.0% 32.5%
33 2010 8/8 4.8 3.3 60.6% 61.5% 48.0% 42.1% 41.7% 56.6% 37.6% 2018 24/24 6.4 3.0 63.5% 71.6% 50.7% 69.3% 38.9% 64.1% 31.6%
34 2011 1/1 0.0 2.0 74.0% 51.4% 30.8% 16.7% 100.0% 46.0% 30.2% — —/— — — — — — — — — —
Career — 390/430 3.5 3.1 59.5% 66.0% 50.2% 54.1% 41.6% 59.6% 37.7% — 218/218 5.8 2.5 62.6% 70.3% 51.0% 60.6% 38.6% 63.0% 31.6%

Advanced Statistics Comparison by Age

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 Stefan Koubek Horacio Zeballos
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 1994 1485 97.3 +0.16 -0.91 0.620 38.4% — — — 0.0% -3.50 — — — +0.13 — — — — — — — — — — — — — — — —
19 1996 1482 96.6 -2.52 -2.52 0.731 43.0% — +24 — 28.6% -1.86 1–0 — — +0.08 — — — — — — — — — — — — — — — —
20 1997 1543 118.6 -0.10 +1.82 1.193 53.2% — +48 — 62.5% +1.00 2–2 (50%) 1–1 — +0.15 — — — — — — — — — — — — — — — —
21 1998 1533 108.9 -0.90 -0.95 0.869 47.6% — +69 — 33.3% -0.80 2–1 (67%) 2–1 (67%) — +0.21 — — — — — — — — — — — — — — — —
22 1999 1681 136.8 -0.61 +1.04 1.009 50.2% -157 +114 — 51.6% +0.05 5–5 (50%) 7–7 (50%) — -0.19 2007 1461 95.8 — — — — — — — — — — — — —
23 2000 1625 128.0 -1.07 -0.50 0.930 48.8% +9 +46 -98 48.5% -0.25 9–8 (53%) 10–10 (50%) — +1.65 2008 1506 105.6 — — — — — — — — — — — — —
24 2001 1698 130.5 -1.96 -0.75 0.896 48.3% -36 -2 — 45.3% -0.31 9–7 (56%) 9–4 (69%) — -0.37 2009 1613 122.4 +1.10 -2.29 0.970 50.1% +38 — — 53.8% +0.27 0–2 6–5 (55%) — +0.76
25 2002 1578 131.6 -3.16 -0.15 0.892 47.7% -9 +101 -81 40.5% -0.74 5–8 (38%) 12–7 (63%) — -0.55 2010 1595 130.9 -1.88 -3.97 0.808 46.6% -14 +43 -118 37.2% -1.03 6–7 (46%) 7–9 (44%) — +0.16
26 2003 1648 134.0 -1.86 +1.04 0.952 49.2% -22 0 -152 46.3% -0.27 4–8 (33%) 9–2 (82%) — -1.35 2011 1598 122.3 +1.03 -2.09 0.954 49.5% — +59 — 48.0% -0.04 0–1 3–4 (43%) — -0.49
27 2004 1757 132.2 -2.49 +0.57 0.941 48.8% -16 -76 -256 45.5% -0.22 11–2 (85%) 9–7 (56%) — -1.10 2012 1591 117.8 -2.87 -2.13 0.873 48.1% — +83 — 31.0% -0.66 0–1 1–4 (20%) — +0.33
28 2005 1570 110.6 -3.42 -1.33 0.865 47.6% +70 +14 — 35.8% -0.96 1–6 (14%) 3–4 (43%) — +0.80 2013 1587 139.5 -1.23 -4.62 0.798 46.8% -106 +128 — 39.6% -0.52 10–5 (67%) 6–13 (32%) — +1.72
29 2006 1694 126.5 -1.41 +1.06 0.991 49.7% +45 -95 — 51.7% -0.05 9–2 (82%) 6–2 (75%) — +0.80 2014 1633 127.6 +0.28 -3.69 0.858 48.3% -130 +105 — 41.7% -0.45 2–1 (67%) 3–3 (50%) — +0.69
30 2007 1763 141.7 -1.17 +0.49 0.969 49.6% +25 -117 — 47.8% -0.16 8–9 (47%) 9–7 (56%) — -0.82 2015 1645 109.3 -1.33 -2.33 0.758 45.3% — +91 — 35.7% -1.72 0–1 2–2 (50%) — +0.09
31 2008 1704 118.9 -4.34 -0.28 0.769 45.0% +16 — — 42.3% -0.69 1–2 (33%) 4–2 (67%) — -0.40 2016 1671 134.9 +0.65 -5.16 0.790 47.3% -42 -28 -181 38.3% -0.77 2–1 (67%) 3–4 (43%) — +0.23
32 2009 1639 122.2 -1.09 -0.53 0.926 48.9% +44 -39 -164 41.3% -0.28 1–3 (25%) 1–6 (14%) — -0.24 2017 1759 146.3 +0.83 -2.99 0.928 48.8% -104 +58 — 45.6% -0.27 8–4 (67%) 13–13 (50%) — -1.38
33 2010 1633 125.7 -2.71 +0.54 0.867 46.8% +123 — — 47.6% +0.09 1–1 2–3 (40%) — +0.03 2018 1721 138.6 +0.08 -3.27 0.880 48.8% -71 +37 — 43.9% -0.35 4–6 (40%) 8–8 (50%) — -1.23
34 2011 1603 113.9 -0.31 -0.24 0.560 38.7% — — — 0.0% -3.50 — — — -0.19 2019 1705 98.3 — — — — — — — — — — — — —
Career — 1796 135.7 -1.82 +0.18 0.932 48.8% -3 +19 -140 45.7% -0.31 69–64 (52%) 84–63 (57%) 111.6 -0.32 — 1877 137.5 -0.40 -3.58 0.854 47.8% -57 +70 -150 41.4% -0.54 32–29 (52%) 52–65 (44%) 103.5 +0.40

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.