H2H data updated: 2026-09-12 00:00 UTC

John Hayes vs Sammy Giammalva Jr H2H: 0-1

Sammy Giammalva Jr holds a 1–0 lead over John Hayes in their ATP head-to-head. Across 1 main-draw meeting, Sammy Giammalva Jr leads 1–0 on hard courts. Most recently, Sammy Giammalva Jr won the 1981 Napa quarterfinal 6-2 6-4.

Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.

John Hayes
USA Age 71 Right-Handed 193 cm / 6'4"
H2H
0 – 1
1 main-draw meetings
Sammy Giammalva Jr
USA Age 63 Right-Handed

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Sammy Giammalva Jr 6-2 6-4 John Hayes Match data Mar 28, 1981* QF Napa ATP 250 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
John Hayes #637 #92 0 1,588 15 28 34.9% 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 John Hayes Sammy Giammalva Jr
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
23 1978 0–1 0.0% #211 1,499 0 0 — — — — — — —
24 1979 1–1 50.0% #252 1,506 0 0 — — — — — — —
25 1980 6–7 46.2% #97 1,581 0 0 — — — — — — —
26 1981 6–14 30.0% #99 1,518 0 0 — — — — — — —
27 1982 2–4 33.3% — 1,518 0 0 — — — — — — —
29 1984 0–1 0.0% #463 1,495 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 John Hayes 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 — — — — — — — — — — — — — — — — — 1980 6 3 9 66.7% 0 1 1 0.0% — — — — — — — —
18 — — — — — — — — — — — — — — — — — 1981 13 8 21 61.9% 8 7 15 53.3% — — — — 2 5 7 28.6%
19 — — — — — — — — — — — — — — — — — 1982 0 3 3 0.0% 1 5 6 16.7% 6 3 9 66.7% 1 4 5 20.0%
20 — — — — — — — — — — — — — — — — — 1983 11 10 21 52.4% 6 5 11 54.5% 2 3 5 40.0% 5 2 7 71.4%
21 — — — — — — — — — — — — — — — — — 1984 8 7 15 53.3% 3 4 7 42.9% 3 2 5 60.0% 1 2 3 33.3%
22 — — — — — — — — — — — — — — — — — 1985 10 8 18 55.6% — — — — 4 4 8 50.0% 4 5 9 44.4%
23 1978 — — — — — — — — — — — — 0 1 1 0.0% 1986 6 8 14 42.9% 3 3 6 50.0% 2 2 4 50.0% 3 4 7 42.9%
24 1979 — — — — — — — — — — — — 1 1 2 50.0% 1987 4 8 12 33.3% 2 3 5 40.0% 4 3 7 57.1% 5 5 10 50.0%
25 1980 3 4 7 42.9% 3 3 6 50.0% — — — — — — — — 1988 7 8 15 46.7% 2 2 4 50.0% 3 3 6 50.0% 4 2 6 66.7%
26 1981 3 9 12 25.0% 3 4 7 42.9% — — — — 0 1 1 0.0% 1989 4 5 9 44.4% 0 2 2 0.0% 0 3 3 0.0% 1 0 1 100.0%
27 1982 — — — — 2 3 5 40.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — —
29 1984 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
Career — 6 14 20 30.0% 8 10 18 44.4% 0 1 1 0.0% 1 3 4 25.0% — 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 John Hayes 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 — — — — — — — — — — — — — — — — 1980 1608 127.7 — — — — +76 — — 50.0% -0.03 3–0 (100%) 1–0 — +0.70
18 — — — — — — — — — — — — — — — — 1981 1672 132.0 — — — — +26 -93 — 50.0% -0.02 15–10 (60%) 8–8 (50%) 103.8 +2.44
19 — — — — — — — — — — — — — — — — 1982 1623 123.4 — — — — -34 -90 +29 41.3% -0.35 4–8 (33%) 3–7 (30%) 94.9 +1.50
20 — — — — — — — — — — — — — — — — 1983 1701 132.6 — — — — -1 -112 -28 53.3% -0.09 7–7 (50%) 8–4 (67%) 103.1 +2.18
21 — — — — — — — — — — — — — — — — 1984 1715 139.4 — — — — -12 -117 +2 47.1% -0.23 6–2 (75%) 3–3 (50%) 105.8 -0.79
22 — — — — — — — — — — — — — — — — 1985 1737 142.0 — — — — +7 — +16 50.6% +0.04 3–2 (60%) 8–3 (73%) 106.1 -0.64
23 1978 1499 107.4 — — — — — — — 0.0% -4.50 — — — -0.17 1986 1740 140.4 — — — — -9 -120 -6 48.8% +0.15 4–6 (40%) 3–1 (75%) 100.4 -1.68
24 1979 1506 98.6 — — — — — — — 40.0% -0.80 1–0 1–0 — +0.45 1987 1644 128.6 — — — — +2 -40 +94 43.4% -0.45 4–4 (50%) 5–6 (45%) 97.9 +0.11
25 1980 1582 123.8 — — — — +8 -13 — 42.9% -0.63 4–2 (67%) 2–3 (40%) 104.0 +0.15 1988 1653 124.7 — — — — -2 -43 +53 51.8% +0.13 7–6 (54%) 5–6 (45%) 97.8 +0.72
26 1981 1519 110.8 — — — — +1 +60 — 32.0% -1.60 5–4 (56%) 6–1 (86%) 104.9 +1.48 1989 1582 113.0 — — — — +68 — +50 35.9% -0.54 2–2 (50%) 0–3 (0%) 96.8 +0.53
27 1982 1519 104.6 — — — — — +54 — 33.3% -1.33 — 1–0 — +0.02 — — — — — — — — — — — — — — — —
29 1984 1496 100.2 — — — — — — — 25.0% -0.75 — 0–1 — +0.20 — — — — — — — — — — — — — — — —
Career — 1589 116.1 — — — — +3 +34 — 35.2% -1.24 10–6 (63%) 10–5 (67%) 109.3 +4.95 — 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.