H2H data updated: 2026-09-02 00:00 UTC

Mark Kaplan vs Mark Knowles H2H: 0-1

Mark Knowles holds a 1–0 lead over Mark Kaplan in their ATP head-to-head. Across 1 main-draw meeting, Mark Knowles leads 1–0 on hard courts. Most recently, Mark Knowles won the 1993 Washington Open round of 64 7-6(9) 6-3.

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Mark Kaplan
RSA Age 58 Right-Handed 185 cm / 6'1"
H2H
0 – 1
1 main draw meetings
Mark Knowles
BAH Age 54 Right-Handed 191 cm / 6'3"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Mark Knowles #206 7-6(9) 6-3 Mark Kaplan #401 Match data Jul 21, 1993* R64 Washington Open ATP Championship Series → modern equivalent ATP 500 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
Mark Kaplan #1,275 #117 278 1,579 11 21 34.4% 0 0 0 0 0 0
Mark Knowles #1,400 #96 484 1,623 23 52 30.7% 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 Kaplan Mark Knowles
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
16 — — — — — — — 1988 0–1 0.0% #728 1,484 0 0
17 — — — — — — — 1989 0–3 0.0% #430 1,449 0 0
19 — — — — — — — 1991 2–3 40.0% #291 1,460 0 0
20 1988 0–1 0.0% #716 1,481 0 0 1992 1–1 50.0% #258 1,484 0 0
21 1989 1–2 33.3% #168 1,477 0 0 1993 3–3 50.0% #173 1,525 0 0
22 1990 5–9 35.7% #180 1,483 0 0 1994 2–7 22.2% #231 1,509 0 0
23 1991 1–4 20.0% #269 1,461 0 0 1995 3–4 42.9% #139 1,549 0 0
24 — — — — — — — 1996 10–17 37.0% #117 1,535 0 0
25 1993 2–4 33.3% #211 1,474 0 0 1997 0–5 0.0% #363 1,493 0 0
26 1994 2–1 66.7% #236 1,505 0 0 1998 2–3 40.0% #273 1,483 0 0
27 — — — — — — — 1999 0–3 0.0% #223 1,451 0 0
28 — — — — — — — 2000 0–2 0.0% #350 1,436 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 Kaplan Mark Knowles
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 %
16 — — — — — — — — — — — — — — — — — 1988 0 1 1 0.0% — — — — — — — — — — — —
17 — — — — — — — — — — — — — — — — — 1989 0 2 2 0.0% 0 1 1 0.0% — — — — — — — —
19 — — — — — — — — — — — — — — — — — 1991 2 3 5 40.0% — — — — — — — — — — — —
20 1988 — — — — 0 1 1 0.0% — — — — — — — — 1992 — — — — — — — — 1 1 2 50.0% — — — —
21 1989 0 1 1 0.0% 1 1 2 50.0% — — — — — — — — 1993 2 2 4 50.0% — — — — — — — — 1 1 2 50.0%
22 1990 0 4 4 0.0% 4 2 6 66.7% 1 3 4 25.0% — — — — 1994 1 5 6 16.7% 0 1 1 0.0% 1 1 2 50.0% — — — —
23 1991 1 3 4 25.0% 0 1 1 0.0% — — — — — — — — 1995 1 2 3 33.3% 1 1 2 50.0% 1 1 2 50.0% — — — —
24 — — — — — — — — — — — — — — — — — 1996 2 9 11 18.2% 1 3 4 25.0% 3 4 7 42.9% 4 1 5 80.0%
25 1993 2 4 6 33.3% — — — — — — — — — — — — 1997 0 3 3 0.0% 0 1 1 0.0% — — — — 0 1 1 0.0%
26 1994 — — — — — — — — 2 1 3 66.7% — — — — 1998 — — — — 0 1 1 0.0% 2 2 4 50.0% — — — —
27 — — — — — — — — — — — — — — — — — 1999 0 2 2 0.0% — — — — — — — — 0 1 1 0.0%
28 — — — — — — — — — — — — — — — — — 2000 0 2 2 0.0% — — — — — — — — — — — —
Career — 3 12 15 20.0% 5 5 10 50.0% 3 4 7 42.9% — — — — — 8 31 39 20.5% 2 8 10 20.0% 8 9 17 47.1% 5 4 9 55.6%

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 12/14 of Mark Kaplan's and 65/71 of Mark Knowles'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 Kaplan Mark Knowles
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 — —/— — — — — — — — — — 1991 5/5 2.4 1.6 62.5% 68.6% 47.8% 56.2% 55.0% 60.2% 39.4%
20 — —/— — — — — — — — — — 1992 2/2 4.0 6.5 52.4% 78.2% 49.7% 83.3% 55.0% 64.9% 38.8%
21 — —/— — — — — — — — — — 1993 6/6 3.8 3.3 51.6% 75.1% 49.1% 56.8% 65.1% 62.4% 38.3%
22 — —/— — — — — — — — — — 1994 8/9 2.6 6.9 59.6% 65.0% 41.6% 46.5% 48.0% 55.5% 39.0%
23 1991 4/5 2.3 3.8 47.1% 68.5% 53.5% 50.7% 27.1% 60.5% 33.7% 1995 6/7 1.8 5.3 60.7% 63.3% 46.7% 46.2% 51.1% 56.4% 32.9%
24 — —/— — — — — — — — — — 1996 25/27 5.6 5.7 53.7% 71.0% 48.5% 58.3% 38.5% 60.4% 37.9%
25 1993 6/6 2.2 1.3 64.5% 70.1% 46.6% 38.9% 46.2% 61.6% 36.0% 1997 5/5 3.0 4.0 54.9% 54.9% 45.0% 51.2% 43.5% 50.0% 40.2%
26 1994 2/3 3.0 2.0 53.7% 72.9% 54.6% 80.0% 30.0% 64.2% 28.7% 1998 4/5 2.8 5.5 61.8% 67.3% 34.9% 59.2% 66.1% 54.8% 39.8%
27 — —/— — — — — — — — — — 1999 2/3 4.5 4.0 64.3% 58.9% 46.9% 38.9% 21.4% 54.0% 34.7%
28 — —/— — — — — — — — — — 2000 2/2 1.5 5.5 56.9% 57.1% 51.5% 35.4% 25.9% 54.5% 35.5%
Career — 12/32 2.3 2.3 56.9% 70.0% 50.2% 49.7% 37.1% 61.7% 34.0% — 65/75 3.9 5.1 56.5% 67.7% 46.5% 54.4% 46.2% 58.2% 37.9%

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 Kaplan Mark Knowles
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 — — — — — — — — — — — — — — — — 1988 1484 98.8 — — — — — — — 33.3% -1.33 0–1 — — +0.14
17 — — — — — — — — — — — — — — — — 1989 1449 88.7 — — — — — — — 0.0% -4.67 — — — +0.23
19 — — — — — — — — — — — — — — — — 1991 1461 102.6 +0.62 -2.64 0.990 49.0% +33 — — 50.0% -0.63 — 1–0 — +0.38
20 1988 1482 90.4 — — — — — — — 0.0% -5.50 — — — +0.20 1992 1484 109.1 -0.44 +1.34 1.106 52.0% — — — 50.0% +1.00 — 0–1 — +0.08
21 1989 1478 102.5 — — — — — — — 37.5% -1.25 1–1 0–1 — +0.18 1993 1526 114.5 +0.34 +0.85 1.017 50.3% +6 — — 50.0% 0.00 0–2 1–1 — +0.13
22 1990 1484 103.1 — — — — 0 +78 +67 36.4% -1.12 1–1 0–1 — +0.06 1994 1509 115.5 -3.12 +0.60 0.877 47.3% -8 — — 40.7% -0.78 0–4 (0%) 1–1 — -0.25
23 1991 1461 106.2 -0.88 -2.66 0.853 47.7% +13 — — 27.3% -1.46 1–0 1–0 — +0.33 1995 1550 118.7 -1.39 -0.67 0.755 45.0% -34 — — 38.1% -1.05 2–1 (67%) 1–1 — -0.33
24 — — — — — — — — — — — — — — — — 1996 1535 112.8 -1.69 -0.03 0.957 49.0% -18 -15 +77 42.5% -0.31 5–6 (45%) 5–9 (36%) — +2.14
25 1993 1475 113.8 +0.61 -0.04 0.937 48.1% +9 — — 30.8% -1.00 — 0–2 — +0.21 1997 1493 119.1 -2.58 +0.64 0.804 45.6% -15 — — 18.2% -2.09 0–2 0–2 — -0.32
26 1994 1506 102.9 -0.42 -1.95 0.800 46.5% — — +84 57.1% +0.29 1–0 1–0 — +0.32 1998 1484 96.7 -2.46 -1.13 0.881 48.0% — — +134 20.0% -2.20 1–0 — — +0.87
27 — — — — — — — — — — — — — — — — 1999 1451 98.8 -0.82 -1.79 0.754 44.4% +7 — — 14.3% -2.14 0–1 — — +0.26
28 — — — — — — — — — — — — — — — — 2000 1437 100.7 -2.24 -1.34 0.780 45.5% — — — 0.0% -2.25 — — — +0.06
29 — — — — — — — — — — — — — — — — 2001 1421 96.8 — — — — — — — — — — — — —
31 — — — — — — — — — — — — — — — — 2003 1410 — — — — — — — — — — — — — —
Career — 1579 106.8 -0.06 -1.23 0.887 47.7% +8 +78 +74 35.1% -1.15 4–2 (67%) 2–4 (33%) 102.6 +4.06 — 1623 115.1 -1.54 -0.20 0.906 48.1% -6 -15 +98 36.7% -0.88 8–17 (32%) 9–15 (38%) 94.9 +4.52

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.