H2H data updated: 2026-09-05 00:00 UTC

Mark Nielsen vs Marcos Ondruska

Compare the head-to-head record, career totals, season-by-season performance, and match log for Mark Nielsen vs Marcos Ondruska.

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Mark Nielsen
NZL Age 48 Right-Handed 185 cm / 6'1"
H2H
0 – 0
0 main-draw meetings
Marcos Ondruska
RSA Age 53 Right-Handed 183 cm / 6'0"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Marcos Ondruska #143 6-3 6-4 Mark Nielsen #173 Match data May 29, 2000 Q1 Q Roland Garros Grand Slam Clay

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.

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
Mark Nielsen #1,519 #172 211 1,524 2 8 20.0% 0 0 0 0 0 0
Marcos Ondruska #1,352 #27 1,007 1,786 106 138 43.4% 0 0 0 0 0 0

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 Mark Nielsen Marcos Ondruska
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
17 — — — — — — — 1990 3–3 50.0% #256 1,537 0 0
18 — — — — — — — 1991 3–5 37.5% #137 1,589 0 0
19 — — — — — — — 1992 11–10 52.4% #67 1,640 0 0
20 1998 1–1 50.0% #339 1,521 0 0 1993 26–29 47.3% #47 1,568 0 0
21 — — — — — — — 1994 15–17 46.9% #98 1,686 0 0
22 2000 0–1 0.0% #262 1,457 0 0 1995 16–19 45.7% #114 1,665 0 0
23 2001 0–1 0.0% #457 1,437 0 0 1996 17–20 45.9% #102 1,675 0 0
24 2002 1–1 50.0% #302 1,457 0 0 1997 12–16 42.9% #113 1,656 0 0
25 2003 0–1 0.0% #549 1,451 0 0 1998 2–10 16.7% #142 1,541 0 0
26 2004 0–1 0.0% #618 1,446 0 0 1999 0–2 0.0% #159 1,520 0 0
27 2005 0–1 0.0% #311 1,436 0 0 2000 0–5 0.0% #204 1,477 0 0
28 2006 0–1 0.0% #890 1,418 0 0 2001 1–2 33.3% #263 1,569 0 0

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 Mark Nielsen Marcos Ondruska
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 — — — — — — — — — — — — — — — — — 1990 3 3 6 50.0% — — — — — — — — — — — —
18 — — — — — — — — — — — — — — — — — 1991 1 3 4 25.0% 2 1 3 66.7% — — — — 0 1 1 0.0%
19 — — — — — — — — — — — — — — — — — 1992 7 7 14 50.0% 4 1 5 80.0% 0 2 2 0.0% — — — —
20 1998 1 1 2 50.0% — — — — — — — — — — — — 1993 12 11 23 52.2% 10 11 21 47.6% 4 3 7 57.1% 0 4 4 0.0%
21 — — — — — — — — — — — — — — — — — 1994 11 9 20 55.0% 3 5 8 37.5% 1 2 3 33.3% 0 1 1 0.0%
22 2000 0 1 1 0.0% — — — — — — — — — — — — 1995 11 12 23 47.8% 1 3 4 25.0% 3 3 6 50.0% 1 1 2 50.0%
23 2001 0 1 1 0.0% — — — — — — — — — — — — 1996 13 13 26 50.0% 0 3 3 0.0% 2 3 5 40.0% 2 1 3 66.7%
24 2002 1 1 2 50.0% — — — — — — — — — — — — 1997 6 10 16 37.5% 4 3 7 57.1% 1 2 3 33.3% 1 1 2 50.0%
25 2003 0 1 1 0.0% — — — — — — — — — — — — 1998 2 7 9 22.2% 0 1 1 0.0% — — — — 0 2 2 0.0%
26 2004 0 1 1 0.0% — — — — — — — — — — — — 1999 0 1 1 0.0% 0 1 1 0.0% — — — — — — — —
27 2005 0 1 1 0.0% — — — — — — — — — — — — 2000 0 4 4 0.0% — — — — 0 1 1 0.0% — — — —
28 2006 0 1 1 0.0% — — — — — — — — — — — — 2001 0 1 1 0.0% 1 1 2 50.0% — — — — — — — —
Career — 2 8 10 20.0% — — — — — — — — — — — — — 66 81 147 44.9% 25 30 55 45.5% 11 16 27 40.7% 4 11 15 26.7%

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 10/10 of Mark Nielsen's and 206/238 of Marcos Ondruska'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 Mark Nielsen Marcos Ondruska
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%
18 — —/— — — — — — — — — — 1991 6/8 0.8 1.2 60.4% 61.6% 45.5% 53.7% 54.4% 53.8% 38.1%
19 — —/— — — — — — — — — — 1992 18/21 1.6 2.1 63.0% 62.9% 49.3% 50.1% 45.0% 57.6% 45.0%
20 1998 2/2 1.0 1.5 65.0% 60.8% 50.9% 63.3% 33.3% 58.0% 23.5% 1993 52/55 2.1 3.6 58.9% 64.5% 48.0% 56.6% 45.3% 57.6% 41.2%
21 — —/— — — — — — — — — — 1994 28/32 2.9 3.9 55.5% 68.3% 46.4% 53.4% 52.7% 58.4% 41.4%
22 2000 1/1 1.0 5.0 65.2% 62.2% 50.0% 75.0% 33.3% 58.0% 30.0% 1995 35/35 3.6 3.8 55.6% 69.3% 45.9% 59.4% 50.1% 59.1% 39.7%
23 2001 1/1 1.0 5.0 62.5% 68.9% 44.4% 66.7% 0.0% 59.7% 28.1% 1996 28/37 3.4 2.9 60.1% 67.6% 48.4% 47.7% 41.6% 59.6% 39.7%
24 2002 2/2 4.0 3.0 61.6% 73.4% 50.2% 44.4% 55.0% 64.8% 32.5% 1997 24/28 3.5 4.5 56.5% 66.3% 44.2% 53.2% 41.3% 56.8% 36.8%
25 2003 1/1 1.0 11.0 45.6% 64.5% 29.7% 45.5% 50.0% 45.6% 38.8% 1998 8/12 3.0 3.4 59.1% 63.2% 40.3% 66.6% 47.6% 53.8% 34.1%
26 2004 1/1 2.0 3.0 59.3% 56.3% 54.5% 62.5% 0.0% 55.6% 34.8% 1999 2/2 1.5 6.5 59.5% 59.5% 38.3% 55.0% 21.4% 51.9% 34.5%
27 2005 1/1 4.0 5.0 68.9% 71.4% 31.6% 57.1% 25.0% 59.0% 30.5% 2000 3/5 4.0 5.7 59.6% 66.5% 39.8% 49.2% 20.0% 56.0% 31.2%
28 2006 1/1 1.0 1.0 76.7% 47.8% 50.0% 55.6% 0.0% 48.3% 25.0% 2001 2/3 4.0 8.0 58.1% 67.0% 49.1% 53.5% 35.8% 59.5% 36.8%
Career — 10/10 2.0 3.9 63.1% 64.0% 46.3% 57.8% 28.5% 57.2% 29.9% — 206/244 2.8 3.6 58.2% 66.2% 46.6% 54.6% 45.8% 57.8% 40.0%

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 Mark Nielsen Marcos Ondruska
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 — — — — — — — — — — — — — — — — 1990 1537 111.9 — — — — +45 — — 41.7% -1.25 1–1 1–0 — +0.20
18 — — — — — — — — — — — — — — — — 1991 1589 127.8 -3.07 +0.45 0.825 46.5% -15 +24 — 40.0% -0.60 1–1 0–1 — -0.46
19 — — — — — — — — — — — — — — — — 1992 1641 118.5 -2.04 +3.41 1.062 51.0% -37 +25 — 50.0% +0.14 4–2 (67%) 2–3 (40%) 102.8 +1.64
20 1998 1521 105.4 +2.23 -0.24 0.559 43.1% — — — 40.0% -1.80 1–0 1–0 — -0.17 1993 1568 136.6 -2.53 +2.02 0.972 49.6% +55 +92 +20 49.3% -0.07 7–11 (39%) 5–5 (50%) 96.4 +1.65
21 — — — — — — — — — — — — — — — — 1994 1687 133.1 -1.29 +1.94 0.994 50.0% -8 -54 -101 51.1% +0.02 6–10 (38%) 6–5 (55%) 97.5 -0.64
22 2000 1457 100.6 -0.91 -0.07 0.714 45.0% — — — 0.0% -2.00 — — — -0.15 1995 1666 131.0 -2.18 +1.47 0.970 49.6% +20 -47 -65 46.9% -0.02 8–7 (53%) 4–9 (31%) 98.1 -0.51
23 2001 1437 104.8 -1.48 +5.54 0.698 44.9% — — — 0.0% -2.00 — — — -0.11 1996 1675 135.7 -1.48 +1.63 0.982 49.3% +38 -128 -51 45.8% -0.15 5–5 (50%) 7–8 (47%) 97.4 -1.02
24 2002 1458 107.6 -1.25 -2.35 0.922 47.1% — — — 50.0% -1.00 — 1–0 — -0.05 1997 1656 124.4 -3.01 -0.51 0.853 47.2% +1 -41 -28 38.0% -0.69 7–2 (78%) 4–7 (36%) 106.2 -0.01
25 2003 1451 100.5 -0.70 -2.29 0.713 42.7% — — — 0.0% -3.50 — — — -0.04 1998 1541 113.3 -3.51 -1.85 0.737 44.6% +23 — — 23.3% -1.53 1–2 (33%) 1–4 (20%) 96.2 +0.28
26 2004 1446 101.8 +1.58 +1.60 0.783 43.9% — — — 0.0% -3.50 — — — -0.09 1999 1520 102.7 -1.06 +2.09 0.716 43.6% — — — 0.0% -2.80 — — — -0.12
27 2005 1437 98.5 -0.05 -2.72 0.744 45.0% — — — 0.0% -2.00 — — — +0.08 2000 1477 113.2 -2.58 +2.02 0.709 43.5% +31 — — 16.7% -2.50 0–2 2–1 (67%) — -0.49
28 2006 1418 95.6 -1.48 +3.03 0.484 38.0% — — — 0.0% -4.50 — — — -0.10 2001 1569 114.2 -1.90 +4.79 0.909 48.2% — — — 33.3% -1.83 1–0 1–1 — -0.37
Career — 1525 104.9 -0.11 -0.01 0.698 44.0% — — — 19.0% -2.29 1–0 2–0 — -6.30 — 1786 135.2 -2.21 +1.52 0.947 49.0% +19 +16 -37 44.4% -0.33 41–43 (49%) 33–44 (43%) 97.0 +0.06

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.