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

Jan Siemerink vs Mark Koevermans H2H: 2-0

Jan Siemerink holds a 2–0 lead over Mark Koevermans in their ATP head-to-head. Across 2 main-draw meetings, Jan Siemerink leads 1–0 on carpet and 1–0 on hard courts. Most recently, Jan Siemerink won the 1991 ABN AMRO Open round of 32 3-6 6-4 6-2.

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Jan Siemerink
NED Age 56 Left-Handed 183 cm / 6'0"
H2H
2 – 0
2 main draw meetings
Mark Koevermans
NED Age 58 Right-Handed 185 cm / 6'1"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Jan Siemerink #53 3-6 6-4 6-2 Mark Koevermans #43 Match data Feb 28, 1991* R32 ABN AMRO Open ATP World Series → modern equivalent ATP 250 Carpet
Jan Siemerink #132 4-6 6-2 6-4 3-6 6-1 Mark Koevermans #51 Match data Jan 20, 1991* R32 Australian Open Grand Slam Hard

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
Jan Siemerink #987 #14 1,863 1,902 261 262 49.9% 0 0 0 0 4 4
Mark Koevermans #753 #37 712 1,777 66 81 44.9% 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 Jan Siemerink Mark Koevermans
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
20 1990 5–4 55.6% #135 1,541 0 0 1988 0–1 0.0% #139 1,493 0 0
21 1991 30–21 58.8% #26 1,756 0 1 1989 12–11 52.2% #63 1,634 0 0
22 1992 22–27 44.9% #57 1,741 0 1 1990 26–19 57.8% #48 1,753 0 1
23 1993 24–25 49.0% #53 1,669 0 1 1991 16–25 39.0% #71 1,597 0 1
24 1994 16–19 45.7% #81 1,686 0 1 1992 12–20 37.5% #139 1,545 0 1
25 1995 37–29 56.1% #21 1,768 0 1 1993 0–5 0.0% #412 1,486 0 1
26 1996 35–28 55.6% #15 1,861 0 2 — — — — — — —
27 1997 18–27 40.0% #78 1,738 0 2 — — — — — — —
28 1998 38–24 61.3% #19 1,809 0 4 — — — — — — —
29 1999 17–25 40.5% #88 1,653 0 4 — — — — — — —
30 2000 7–14 33.3% #104 1,573 0 4 — — — — — — —
31 2001 12–17 41.4% #127 1,563 0 4 — — — — — — —
32 2002 0–2 0.0% #438 1,531 0 4 — — — — — — —

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 Jan Siemerink Mark Koevermans
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 %
20 1990 3 2 5 60.0% — — — — 1 1 2 50.0% 1 1 2 50.0% 1988 — — — — 0 1 1 0.0% — — — — — — — —
21 1991 16 7 23 69.6% 0 4 4 0.0% 1 3 4 25.0% 13 7 20 65.0% 1989 5 4 9 55.6% 3 4 7 42.9% — — — — 4 3 7 57.1%
22 1992 10 12 22 45.5% 2 6 8 25.0% 1 2 3 33.3% 9 7 16 56.3% 1990 7 5 12 58.3% 15 9 24 62.5% 3 1 4 75.0% 1 4 5 20.0%
23 1993 11 13 24 45.8% 4 4 8 50.0% 1 3 4 25.0% 8 5 13 61.5% 1991 4 8 12 33.3% 12 12 24 50.0% 0 1 1 0.0% 0 4 4 0.0%
24 1994 9 11 20 45.0% 1 2 3 33.3% — — — — 6 6 12 50.0% 1992 1 5 6 16.7% 11 13 24 45.8% 0 1 1 0.0% 0 1 1 0.0%
25 1995 20 12 32 62.5% 7 6 13 53.8% 3 3 6 50.0% 7 8 15 46.7% 1993 — — — — 0 5 5 0.0% — — — — — — — —
26 1996 14 14 28 50.0% 2 4 6 33.3% 7 2 9 77.8% 12 8 20 60.0% — — — — — — — — — — — — — — — — —
27 1997 10 12 22 45.5% 4 5 9 44.4% 1 3 4 25.0% 3 7 10 30.0% — — — — — — — — — — — — — — — — —
28 1998 18 11 29 62.1% 0 4 4 0.0% 8 3 11 72.7% 12 6 18 66.7% — — — — — — — — — — — — — — — — —
29 1999 10 12 22 45.5% 1 4 5 20.0% 2 3 5 40.0% 4 6 10 40.0% — — — — — — — — — — — — — — — — —
30 2000 2 8 10 20.0% 4 3 7 57.1% 1 3 4 25.0% — — — — — — — — — — — — — — — — — — — — —
31 2001 6 6 12 50.0% 4 7 11 36.4% 2 4 6 33.3% — — — — — — — — — — — — — — — — — — — — —
32 2002 0 1 1 0.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
Career — 129 121 250 51.6% 29 50 79 36.7% 28 30 58 48.3% 75 61 136 55.1% — 17 22 39 43.6% 41 44 85 48.2% 3 3 6 50.0% 5 12 17 29.4%

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 448/514 of Jan Siemerink's and 68/78 of Mark Koevermans'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 Jan Siemerink Mark Koevermans
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%
21 1991 48/51 7.0 5.1 52.3% 75.3% 53.3% 58.8% 44.6% 64.8% 37.8% — —/— — — — — — — — — —
22 1992 42/49 6.2 4.2 54.6% 72.8% 50.4% 63.1% 36.0% 62.7% 34.7% — —/— — — — — — — — — —
23 1993 41/49 6.4 4.0 56.6% 76.6% 50.8% 62.6% 44.2% 65.2% 35.5% 1991 39/41 3.0 2.0 53.9% 68.7% 44.7% 57.3% 41.1% 57.7% 39.6%
24 1994 34/35 6.1 4.0 60.1% 75.5% 50.2% 63.0% 40.6% 65.5% 36.4% 1992 24/32 3.5 1.7 55.8% 68.5% 49.8% 48.5% 39.0% 59.6% 37.8%
25 1995 61/66 5.4 3.4 59.5% 73.7% 53.2% 64.8% 37.0% 65.3% 35.9% 1993 5/5 3.0 2.2 58.2% 56.0% 43.9% 43.0% 36.6% 51.0% 33.8%
26 1996 61/63 6.5 5.1 55.7% 75.7% 51.2% 65.5% 39.7% 64.8% 35.9% — —/— — — — — — — — — —
27 1997 38/45 7.7 5.0 56.5% 74.2% 52.0% 66.9% 45.4% 64.4% 35.1% — —/— — — — — — — — — —
28 1998 48/62 8.3 4.6 58.0% 77.7% 52.2% 65.2% 43.2% 66.9% 34.3% — —/— — — — — — — — — —
29 1999 30/42 5.9 5.1 55.5% 73.7% 50.1% 56.9% 38.4% 63.1% 32.6% — —/— — — — — — — — — —
30 2000 17/21 6.5 5.8 54.9% 73.6% 46.0% 64.2% 28.0% 61.4% 33.6% — —/— — — — — — — — — —
31 2001 26/29 7.2 5.9 52.8% 75.6% 48.7% 56.6% 34.2% 62.7% 32.1% — —/— — — — — — — — — —
32 2002 2/2 7.0 6.0 54.2% 76.2% 50.9% 42.9% 50.0% 64.8% 27.2% — —/— — — — — — — — — —
Career — 448/523 6.6 4.6 56.3% 75.1% 51.3% 62.8% 40.0% 64.6% 35.2% — 68/147 3.2 1.9 54.9% 67.7% 46.5% 53.1% 40.0% 57.8% 38.6%

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 Jan Siemerink Mark Koevermans
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
20 1990 1541 108.1 — — — — +36 — — 52.6% -0.05 1–0 — — +1.03 1988 1493 106.4 — — — — — — — 33.3% -0.67 0–1 1–1 — -0.10
21 1991 1757 143.1 +3.22 -0.58 1.074 51.5% +40 -248 -209 55.7% +0.44 11–10 (52%) 14–13 (52%) — -0.39 1989 1634 132.7 — — — — +3 -82 — 50.0% +0.11 2–1 (67%) 2–2 (50%) — +0.70
22 1992 1741 139.7 +1.78 -2.28 0.929 49.2% +31 -264 -201 43.8% -0.47 7–7 (50%) 10–6 (63%) — -2.48 1990 1754 136.3 — — — — -104 +4 -109 52.9% +0.28 13–5 (72%) 6–10 (38%) — +1.01
23 1993 1669 136.6 +2.63 -1.58 1.020 50.4% +20 -120 -143 50.0% +0.11 8–11 (42%) 13–14 (48%) — +0.60 1991 1597 132.1 -2.18 +0.19 0.936 48.7% -42 +156 — 43.1% -0.42 3–10 (23%) 3–7 (30%) — +0.74
24 1994 1686 139.2 +3.09 -0.26 1.054 50.9% -6 -131 — 48.8% +0.01 3–7 (30%) 8–8 (50%) — -1.29 1992 1546 118.8 -1.22 -1.57 0.936 48.5% -47 +137 — 40.0% -0.41 4–8 (33%) 1–7 (13%) — +2.50
25 1995 1768 149.5 +3.33 -1.32 1.035 50.6% -12 -116 -191 54.4% +0.22 11–8 (58%) 12–7 (63%) — -2.79 1993 1486 101.6 -2.05 -3.43 0.689 42.8% — +104 — 15.4% -2.46 0–2 1–0 — +0.01
26 1996 1862 148.8 +2.53 -0.73 1.019 50.6% -13 -212 -147 54.0% +0.10 11–10 (52%) 30–16 (65%) — -1.35 — — — — — — — — — — — — — — — —
27 1997 1739 137.7 +1.77 -1.30 0.987 50.2% +24 -75 -78 43.8% -0.28 7–12 (37%) 12–13 (48%) — -0.14 — — — — — — — — — — — — — — — —
28 1998 1810 145.1 +3.80 -2.09 1.038 50.9% +13 -234 -13 57.3% +0.46 15–7 (68%) 14–16 (47%) — -0.24 — — — — — — — — — — — — — — — —
29 1999 1654 132.5 +1.25 -2.98 0.884 48.1% +56 -141 +72 42.6% -0.49 6–7 (46%) 7–9 (44%) — +0.21 — — — — — — — — — — — — — — — —
30 2000 1573 115.4 -0.13 -3.10 0.870 47.9% +66 -41 +96 37.0% -0.83 3–5 (38%) 4–2 (67%) — +0.50 — — — — — — — — — — — — — — — —
31 2001 1564 122.8 +0.45 -4.28 0.859 47.7% +102 -52 +33 38.7% -0.73 6–4 (60%) 6–11 (35%) — -0.11 — — — — — — — — — — — — — — — —
32 2002 1531 102.5 -1.57 -0.36 0.773 46.8% — — — 20.0% -1.20 0–1 1–3 (25%) — -0.01 — — — — — — — — — — — — — — — —
Career — 1902 144.8 +2.44 -1.62 0.993 50.1% +20 -133 -71 49.5% -0.03 89–89 (50%) 131–118 (53%) 104.4 -1.24 — 1777 133.6 -1.83 -0.70 0.915 48.2% -49 +84 -109 45.6% -0.19 22–27 (45%) 14–27 (34%) 93.3 +3.31

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.