H2H data updated: 2026-09-01 00:00 UTC

Blaine Willenborg vs Stefan Simonsson H2H: 1-0

Blaine Willenborg holds a 1–0 lead over Stefan Simonsson in their ATP head-to-head. Across 1 main-draw meeting, Blaine Willenborg leads 1–0 on clay. Most recently, Blaine Willenborg won the 1984 North Conway round of 32 4-6 6-3 6-1.

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Blaine Willenborg
USA Age 66 Right-Handed 170 cm / 5'7"
H2H
1 – 0
1 main draw meetings
Stefan Simonsson
SWE Age 66 Right-Handed 175 cm / 5'9"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Blaine Willenborg #87 4-6 6-3 6-1 Stefan Simonsson #117 Match data Aug 2, 1984* R32 North Conway ATP 250 Clay

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
Blaine Willenborg #1,067 #50 0 1,624 33 54 37.9% 0 0 0 0 0 0
Stefan Simonsson #702 #48 0 1,788 98 121 44.7% 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 Blaine Willenborg Stefan Simonsson
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
17 — — — — — — — 1977 0–2 0.0% — 1,484 0 0
18 — — — — — — — 1978 1–1 50.0% #340 1,502 0 0
19 1979 0–1 0.0% #579 1,488 0 0 1979 8–8 50.0% #137 1,573 0 0
20 1980 3–5 37.5% #283 1,514 0 0 1980 12–19 38.7% #142 1,544 0 0
21 — — — — — — — 1981 5–10 33.3% — 1,526 0 0
22 — — — — — — — 1982 21–20 51.2% #94 1,704 0 0
23 1983 1–3 25.0% — 1,524 0 0 1983 24–19 55.8% #61 1,675 0 0
24 1984 6–10 37.5% #79 1,533 0 0 1984 17–22 43.6% #119 1,676 0 0
25 1985 8–12 40.0% #188 1,578 0 0 1985 10–16 38.5% #162 1,620 0 0
26 1986 5–9 35.7% #160 1,535 0 0 1986 0–4 0.0% #354 1,546 0 0
27 1987 10–11 47.6% #145 1,588 0 0 — — — — — — —
28 1988 0–3 0.0% #731 1,547 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 Blaine Willenborg Stefan Simonsson
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 — — — — — — — — — — — — — — — — — 1977 0 1 1 0.0% 0 1 1 0.0% — — — — — — — —
18 — — — — — — — — — — — — — — — — — 1978 1 1 2 50.0% — — — — — — — — — — — —
19 1979 — — — — 0 1 1 0.0% — — — — — — — — 1979 3 2 5 60.0% 3 5 8 37.5% — — — — 2 1 3 66.7%
20 1980 1 2 3 33.3% 2 3 5 40.0% — — — — — — — — 1980 1 3 4 25.0% 10 12 22 45.5% 0 1 1 0.0% 1 3 4 25.0%
21 — — — — — — — — — — — — — — — — — 1981 1 2 3 33.3% 4 7 11 36.4% — — — — 0 1 1 0.0%
22 — — — — — — — — — — — — — — — — — 1982 6 5 11 54.5% 13 13 26 50.0% 2 1 3 66.7% 0 1 1 0.0%
23 1983 1 2 3 33.3% 0 1 1 0.0% — — — — — — — — 1983 8 8 16 50.0% 14 8 22 63.6% 1 1 2 50.0% 1 2 3 33.3%
24 1984 0 2 2 0.0% 6 7 13 46.2% 0 1 1 0.0% — — — — 1984 2 6 8 25.0% 9 11 20 45.0% 5 3 8 62.5% 1 2 3 33.3%
25 1985 1 2 3 33.3% 7 10 17 41.2% — — — — — — — — 1985 1 3 4 25.0% 9 12 21 42.9% 0 1 1 0.0% — — — —
26 1986 1 1 2 50.0% 4 7 11 36.4% — — — — 0 1 1 0.0% 1986 — — — — 0 2 2 0.0% 0 1 1 0.0% 0 1 1 0.0%
27 1987 4 5 9 44.4% 4 5 9 44.4% — — — — 2 1 3 66.7% — — — — — — — — — — — — — — — — —
28 1988 0 1 1 0.0% 0 1 1 0.0% — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — —
Career — 8 15 23 34.8% 23 35 58 39.7% 0 1 1 0.0% 2 3 5 40.0% — 23 31 54 42.6% 62 71 133 46.6% 8 8 16 50.0% 5 11 16 31.2%

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 Blaine Willenborg Stefan Simonsson
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 — — — — — — — — — — — — — — — — 1977 1485 101.7 — — — — — — — 20.0% -3.00 0–1 — — -0.03
18 — — — — — — — — — — — — — — — — 1978 1503 109.9 — — — — — — — 50.0% 0.00 — — — -0.02
19 1979 1488 100.7 — — — — — — — 33.3% -1.00 0–1 — — +0.07 1979 1573 120.2 — — — — +59 -53 — 54.1% -0.03 1–4 (20%) 6–1 (86%) — +1.36
20 1980 1514 103.6 — — — — +42 +1 — 33.3% -0.95 2–0 0–1 — +0.52 1980 1544 125.2 — — — — +24 +16 — 39.5% -0.49 6–6 (50%) 2–2 (50%) — +1.54
21 — — — — — — — — — — — — — — — — 1981 1526 115.7 — — — — +17 +34 — 37.1% -0.63 2–5 (29%) 0–2 — +0.91
22 — — — — — — — — — — — — — — — — 1982 1704 136.7 — — — — -82 -48 -110 50.0% -0.02 4–6 (40%) 6–6 (50%) — -0.71
23 1983 1524 117.1 — — — — +36 — — 25.0% -0.75 — 1–3 (25%) — -0.68 1983 1675 131.1 — — — — -53 +65 — 52.4% -0.06 8–5 (62%) 7–4 (64%) — +1.84
24 1984 1533 127.2 — — — — — +52 — 39.0% -0.66 3–4 (43%) 3–1 (75%) — -0.13 1984 1676 134.5 — — — — -75 -4 +37 47.2% -0.28 5–11 (31%) 8–3 (73%) — +0.29
25 1985 1578 123.2 — — — — -54 +29 — 43.1% -0.71 3–5 (38%) 6–4 (60%) — +0.25 1985 1620 130.1 — — — — -54 +24 — 42.6% -0.44 3–6 (33%) 3–5 (38%) — -1.32
26 1986 1535 110.9 — — — — -23 +43 — 41.7% -0.70 2–4 (33%) 4–3 (57%) — +1.19 1986 1546 94.2 — — — — — — — 20.0% -2.30 0–2 — — +0.69
27 1987 1588 119.3 — — — — -22 -7 — 44.0% -0.44 5–2 (71%) 3–3 (50%) — +0.52 — — — — — — — — — — — — — — — —
28 1988 1548 103.4 — — — — — — — 25.0% -1.63 0–2 0–1 — +0.09 — — — — — — — — — — — — — — — —
Career — 1624 124.4 — — — — -11 +29 — 39.9% -0.70 15–18 (45%) 17–16 (52%) 103.3 +2.10 — 1789 134.5 — — — — -35 +7 -3 46.2% -0.31 29–46 (39%) 32–23 (58%) 102.1 +2.08

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.