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

Grant Stafford vs Mark Knowles H2H: 0-1

Mark Knowles holds a 1–0 lead over Grant Stafford in their ATP head-to-head. Across 1 main-draw meeting, Mark Knowles leads 1–0 on grass. Most recently, Mark Knowles won the 1998 Newport round of 16 7-5 4-6 6-4.

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Grant Stafford
RSA Age 55 Right-Handed 188 cm / 6'2"
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 #744 7-5 4-6 6-4 Grant Stafford #108 Match data Jul 10, 1998* R16 Newport ATP World Series → modern equivalent ATP 250 Grass

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
Grant Stafford #1,161 #53 750 1,807 83 111 42.8% 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 Grant Stafford 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 1990 0–1 0.0% #264 1,492 0 0 1991 2–3 40.0% #291 1,460 0 0
20 1991 5–6 45.5% #172 1,552 0 0 1992 1–1 50.0% #258 1,484 0 0
21 1992 4–4 50.0% #191 1,635 0 0 1993 3–3 50.0% #173 1,525 0 0
22 1993 17–14 54.8% #86 1,717 0 0 1994 2–7 22.2% #231 1,509 0 0
23 1994 11–21 34.4% #168 1,558 0 0 1995 3–4 42.9% #139 1,549 0 0
24 1995 2–7 22.2% #288 1,530 0 0 1996 10–17 37.0% #117 1,535 0 0
25 1996 10–13 43.5% #83 1,563 0 0 1997 0–5 0.0% #363 1,493 0 0
26 1997 21–20 51.2% #74 1,657 0 0 1998 2–3 40.0% #273 1,483 0 0
27 1998 12–21 36.4% #163 1,564 0 0 1999 0–3 0.0% #223 1,451 0 0
28 1999 0–3 0.0% #475 1,535 0 0 2000 0–2 0.0% #350 1,436 0 0
29 2000 1–1 50.0% #435 1,592 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 Grant Stafford 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 1990 0 1 1 0.0% — — — — — — — — — — — — 1991 2 3 5 40.0% — — — — — — — — — — — —
20 1991 5 4 9 55.6% — — — — — — — — 0 2 2 0.0% 1992 — — — — — — — — 1 1 2 50.0% — — — —
21 1992 2 3 5 40.0% — — — — 2 1 3 66.7% — — — — 1993 2 2 4 50.0% — — — — — — — — 1 1 2 50.0%
22 1993 13 11 24 54.2% — — — — 4 3 7 57.1% — — — — 1994 1 5 6 16.7% 0 1 1 0.0% 1 1 2 50.0% — — — —
23 1994 9 12 21 42.9% 2 5 7 28.6% 0 3 3 0.0% 0 1 1 0.0% 1995 1 2 3 33.3% 1 1 2 50.0% 1 1 2 50.0% — — — —
24 1995 2 5 7 28.6% 0 1 1 0.0% 0 1 1 0.0% — — — — 1996 2 9 11 18.2% 1 3 4 25.0% 3 4 7 42.9% 4 1 5 80.0%
25 1996 3 8 11 27.3% — — — — 5 2 7 71.4% 2 3 5 40.0% 1997 0 3 3 0.0% 0 1 1 0.0% — — — — 0 1 1 0.0%
26 1997 10 11 21 47.6% 4 3 7 57.1% 6 4 10 60.0% 1 2 3 33.3% 1998 — — — — 0 1 1 0.0% 2 2 4 50.0% — — — —
27 1998 8 12 20 40.0% 1 5 6 16.7% 3 4 7 42.9% — — — — 1999 0 2 2 0.0% — — — — — — — — 0 1 1 0.0%
28 1999 0 2 2 0.0% — — — — 0 1 1 0.0% — — — — 2000 0 2 2 0.0% — — — — — — — — — — — —
29 2000 1 1 2 50.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
Career — 53 70 123 43.1% 7 14 21 33.3% 20 19 39 51.3% 3 8 11 27.3% — 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 168/193 of Grant Stafford'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 Grant Stafford 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 1991 10/11 1.6 2.9 66.6% 61.7% 43.9% 53.1% 40.6% 55.5% 39.0% 1992 2/2 4.0 6.5 52.4% 78.2% 49.7% 83.3% 55.0% 64.9% 38.8%
21 1992 8/8 3.6 5.8 60.4% 64.4% 34.5% 42.1% 40.5% 53.0% 42.7% 1993 6/6 3.8 3.3 51.6% 75.1% 49.1% 56.8% 65.1% 62.4% 38.3%
22 1993 25/31 2.3 3.2 61.9% 66.5% 46.6% 53.3% 50.5% 59.1% 44.0% 1994 8/9 2.6 6.9 59.6% 65.0% 41.6% 46.5% 48.0% 55.5% 39.0%
23 1994 26/32 2.3 4.2 60.8% 64.3% 43.2% 48.3% 39.9% 56.0% 39.8% 1995 6/7 1.8 5.3 60.7% 63.3% 46.7% 46.2% 51.1% 56.4% 32.9%
24 1995 7/9 3.7 4.7 61.7% 64.6% 44.0% 53.7% 40.4% 56.3% 39.2% 1996 25/27 5.6 5.7 53.7% 71.0% 48.5% 58.3% 38.5% 60.4% 37.9%
25 1996 22/23 4.9 2.7 60.2% 70.3% 49.0% 61.2% 37.6% 61.8% 38.5% 1997 5/5 3.0 4.0 54.9% 54.9% 45.0% 51.2% 43.5% 50.0% 40.2%
26 1997 36/41 4.8 3.5 55.4% 71.7% 51.0% 53.0% 53.2% 62.4% 41.1% 1998 4/5 2.8 5.5 61.8% 67.3% 34.9% 59.2% 66.1% 54.8% 39.8%
27 1998 30/33 3.9 4.3 56.9% 67.1% 44.0% 49.0% 33.6% 57.0% 38.4% 1999 2/3 4.5 4.0 64.3% 58.9% 46.9% 38.9% 21.4% 54.0% 34.7%
28 1999 2/3 1.5 6.5 61.6% 70.0% 34.4% 45.2% 13.3% 56.4% 35.6% 2000 2/2 1.5 5.5 56.9% 57.1% 51.5% 35.4% 25.9% 54.5% 35.5%
29 2000 2/2 8.0 7.5 61.9% 79.4% 48.2% 59.2% 34.2% 68.1% 39.9% — —/— — — — — — — — — —
Career — 168/194 3.6 3.8 59.4% 67.6% 45.9% 52.2% 42.6% 58.8% 40.3% — 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 Grant Stafford 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 1990 1493 101.2 — — — — — — — 0.0% -3.50 — 0–1 — -0.11 1991 1461 102.6 +0.62 -2.64 0.990 49.0% +33 — — 50.0% -0.63 — 1–0 — +0.38
20 1991 1553 120.2 -2.74 +0.10 0.877 47.4% +35 — — 37.9% -0.86 4–0 (100%) 1–3 (25%) — +0.35 1992 1484 109.1 -0.44 +1.34 1.106 52.0% — — — 50.0% +1.00 — 0–1 — +0.08
21 1992 1636 116.0 -2.73 +2.89 0.909 47.9% -35 — +9 52.4% -0.43 1–1 3–0 (100%) — -0.68 1993 1526 114.5 +0.34 +0.85 1.017 50.3% +6 — — 50.0% 0.00 0–2 1–1 — +0.13
22 1993 1718 129.9 -1.48 +4.18 1.076 51.6% -17 — -65 55.2% +0.18 4–2 (67%) 6–3 (67%) — +0.11 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 1994 1558 130.9 -3.88 +1.31 0.904 47.9% +81 -50 +43 40.5% -0.46 3–10 (23%) 4–4 (50%) — -0.87 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 1995 1530 116.1 -1.20 +0.97 0.895 47.6% +80 — — 32.0% -0.92 2–4 (33%) 1–4 (20%) — -0.12 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 1996 1563 122.3 -0.43 -0.01 1.008 50.1% +9 — +95 48.3% +0.05 2–6 (25%) 4–4 (50%) — +1.72 1997 1493 119.1 -2.58 +0.64 0.804 45.6% -15 — — 18.2% -2.09 0–2 0–2 — -0.32
26 1997 1658 134.1 +0.10 +3.52 1.093 51.4% -32 -111 +67 50.0% +0.05 7–8 (47%) 4–5 (44%) — -0.14 1998 1484 96.7 -2.46 -1.13 0.881 48.0% — — +134 20.0% -2.20 1–0 — — +0.87
27 1998 1565 127.0 -3.40 +0.46 0.893 47.5% +59 -78 +128 39.2% -0.82 3–6 (33%) 3–3 (50%) — -0.07 1999 1451 98.8 -0.82 -1.79 0.754 44.4% +7 — — 14.3% -2.14 0–1 — — +0.26
28 1999 1535 103.1 +1.15 -0.33 0.817 44.9% — — — 0.0% -2.86 — — — -0.39 2000 1437 100.7 -2.24 -1.34 0.780 45.5% — — — 0.0% -2.25 — — — +0.06
29 2000 1592 112.5 +0.96 +1.20 1.250 53.0% — — — 62.5% +0.63 0–1 1–0 — -0.05 2001 1421 96.8 — — — — — — — — — — — — —
31 — — — — — — — — — — — — — — — — 2003 1410 — — — — — — — — — — — — — —
Career — 1808 133.9 -1.78 +1.85 0.977 49.4% +21 -80 +52 44.8% -0.34 26–38 (41%) 27–27 (50%) 100.0 -0.13 — 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.