H2H data updated: 2026-09-13 00:00 UTC

Glenn Michibata vs Sammy Giammalva Jr H2H: 0-1

Sammy Giammalva Jr holds a 1–0 lead over Glenn Michibata in their ATP head-to-head. Across 1 main-draw meeting, Sammy Giammalva Jr leads 1–0 on carpet. Most recently, Sammy Giammalva Jr won the 1989 Philadelphia round of 64 6-0 6-1.

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Glenn Michibata
CAN Age 64 Right-Handed 175 cm / 5'9"
H2H
0 – 1
1 main-draw meetings
Sammy Giammalva Jr
USA Age 63 Right-Handed

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Sammy Giammalva Jr 6-0 6-1 Glenn Michibata #84 Match data Feb 22, 1989* R64 Philadelphia ATP 250 Carpet

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
Glenn Michibata #1,341 #48 152 1,676 70 112 38.5% 0 0 0 0 0 0
Sammy Giammalva Jr — — — 1,803 — — — 0 0 0 0 2 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 Glenn Michibata Sammy Giammalva Jr
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
17 1979 0–1 0.0% #579 1,495 0 0 — — — — — — —
18 1980 0–2 0.0% — 1,474 0 0 — — — — — — —
19 1981 0–1 0.0% — 1,470 0 0 — — — — — — —
20 1982 7–6 53.8% — 1,560 0 0 — — — — — — —
21 1983 10–10 50.0% #78 1,646 0 0 — — — — — — —
22 1984 7–17 29.2% #161 1,570 0 0 — — — — — — —
23 1985 7–6 53.8% #76 1,652 0 0 — — — — — — —
24 1986 7–20 25.9% #206 1,517 0 0 — — — — — — —
25 1987 5–8 38.5% #178 1,497 0 0 — — — — — — —
26 1988 9–12 42.9% #102 1,561 0 0 — — — — — — —
27 1989 13–21 38.2% #191 1,514 0 0 — — — — — — —
28 1990 0–1 0.0% #481 1,504 0 0 — — — — — — —
29 1991 5–6 45.5% #232 1,531 0 0 — — — — — — —
30 1992 0–1 0.0% #465 1,515 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 Glenn Michibata Sammy Giammalva Jr
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 1979 0 1 1 0.0% — — — — — — — — — — — — 1980 6 3 9 66.7% 0 1 1 0.0% — — — — — — — —
18 1980 0 1 1 0.0% — — — — — — — — 0 1 1 0.0% 1981 13 8 21 61.9% 8 7 15 53.3% — — — — 2 5 7 28.6%
19 1981 0 1 1 0.0% — — — — — — — — — — — — 1982 0 3 3 0.0% 1 5 6 16.7% 6 3 9 66.7% 1 4 5 20.0%
20 1982 2 2 4 50.0% 3 1 4 75.0% — — — — 2 3 5 40.0% 1983 11 10 21 52.4% 6 5 11 54.5% 2 3 5 40.0% 5 2 7 71.4%
21 1983 6 8 14 42.9% — — — — — — — — 4 2 6 66.7% 1984 8 7 15 53.3% 3 4 7 42.9% 3 2 5 60.0% 1 2 3 33.3%
22 1984 2 8 10 20.0% 0 2 2 0.0% 2 3 5 40.0% 3 4 7 42.9% 1985 10 8 18 55.6% — — — — 4 4 8 50.0% 4 5 9 44.4%
23 1985 5 2 7 71.4% — — — — 1 1 2 50.0% 1 3 4 25.0% 1986 6 8 14 42.9% 3 3 6 50.0% 2 2 4 50.0% 3 4 7 42.9%
24 1986 3 9 12 25.0% 0 2 2 0.0% 0 3 3 0.0% 4 6 10 40.0% 1987 4 8 12 33.3% 2 3 5 40.0% 4 3 7 57.1% 5 5 10 50.0%
25 1987 3 4 7 42.9% 0 1 1 0.0% 2 3 5 40.0% — — — — 1988 7 8 15 46.7% 2 2 4 50.0% 3 3 6 50.0% 4 2 6 66.7%
26 1988 7 10 17 41.2% — — — — 2 2 4 50.0% — — — — 1989 4 5 9 44.4% 0 2 2 0.0% 0 3 3 0.0% 1 0 1 100.0%
27 1989 11 15 26 42.3% 1 1 2 50.0% 1 2 3 33.3% 0 3 3 0.0% — — — — — — — — — — — — — — — — —
28 1990 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
29 1991 3 3 6 50.0% — — — — 1 2 3 33.3% 1 1 2 50.0% — — — — — — — — — — — — — — — — —
30 1992 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
Career — 42 66 108 38.9% 4 7 11 36.4% 9 16 25 36.0% 15 23 38 39.5% — 69 68 137 50.4% 25 32 57 43.9% 24 23 47 51.1% 26 29 55 47.3%

Advanced Statistics Comparison by Age

Seasons are aligned by the age each player spent most of that calendar year. Metrics use eligible main-draw results; point statistics use matches with detailed data. 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 Glenn Michibata Sammy Giammalva Jr
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 1979 1496 105.3 — — — — — — — 33.3% -2.00 0–1 — — -0.10 1980 1608 127.7 — — — — +76 — — 50.0% -0.03 3–0 (100%) 1–0 — +0.70
18 1980 1475 98.3 — — — — — — — 0.0% -3.00 — 0–1 — +0.19 1981 1672 132.0 — — — — +26 -93 — 50.0% -0.02 15–10 (60%) 8–8 (50%) 103.8 +2.44
19 1981 1470 100.7 — — — — — — — 0.0% -3.00 — — — -0.06 1982 1623 123.4 — — — — -34 -90 +29 41.3% -0.35 4–8 (33%) 3–7 (30%) 94.9 +1.50
20 1982 1561 125.5 — — — — +4 +12 — 53.6% +0.32 3–1 (75%) 3–1 (75%) 107.3 +1.21 1983 1701 132.6 — — — — -1 -112 -28 53.3% -0.09 7–7 (50%) 8–4 (67%) 103.1 +2.18
21 1983 1646 121.8 — — — — -12 — — 50.0% -0.29 2–3 (40%) 5–2 (71%) 103.2 +1.03 1984 1715 139.4 — — — — -12 -117 +2 47.1% -0.23 6–2 (75%) 3–3 (50%) 105.8 -0.79
22 1984 1571 127.7 — — — — +27 — -3 33.9% -1.32 1–5 (17%) 4–3 (57%) 95.8 -0.53 1985 1737 142.0 — — — — +7 — +16 50.6% +0.04 3–2 (60%) 8–3 (73%) 106.1 -0.64
23 1985 1652 133.2 — — — — +23 — — 56.7% +0.07 1–3 (25%) 2–1 (67%) 100.6 +0.11 1986 1740 140.4 — — — — -9 -120 -6 48.8% +0.15 4–6 (40%) 3–1 (75%) 100.4 -1.68
24 1986 1517 115.6 — — — — +37 — -16 34.8% -1.11 0–6 (0%) 4–2 (67%) 93.7 +0.66 1987 1644 128.6 — — — — +2 -40 +94 43.4% -0.45 4–4 (50%) 5–6 (45%) 97.9 +0.11
25 1987 1498 112.9 — — — — +71 — -5 34.4% -0.69 3–0 (100%) 1–4 (20%) 102.9 +0.68 1988 1653 124.7 — — — — -2 -43 +53 51.8% +0.13 7–6 (54%) 5–6 (45%) 97.8 +0.72
26 1988 1561 115.4 — — — — +12 — -28 46.2% -0.38 0–4 (0%) 4–5 (44%) 96.1 +0.73 1989 1582 113.0 — — — — +68 — +50 35.9% -0.54 2–2 (50%) 0–3 (0%) 96.8 +0.53
27 1989 1515 119.0 — — — — +9 — +22 42.0% -0.76 4–5 (44%) 7–11 (39%) 97.2 +0.90 — — — — — — — — — — — — — — — —
28 1990 1504 102.7 — — — — — — — 0.0% -2.50 — 0–1 — +0.06 — — — — — — — — — — — — — — — —
29 1991 1531 102.9 -1.41 -2.23 0.827 46.3% +8 — +22 39.3% -1.29 2–0 4–1 (80%) — +0.67 — — — — — — — — — — — — — — — —
30 1992 1515 98.5 -3.20 +3.27 0.779 46.0% — — — 0.0% -2.50 — — — +0.15 — — — — — — — — — — — — — — — —
Career — 1676 125.9 -1.56 -1.77 0.823 46.3% +17 +12 -3 41.2% -0.75 16–28 (36%) 34–32 (52%) 99.9 +3.15 — 1804 139.1 — — — — +8 -94 +29 48.1% -0.11 55–47 (54%) 44–41 (52%) 103.6 +1.72

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.