H2H data updated: 2026-09-07 00:00 UTC
Sammy Giammalva Jr holds a 1–0 lead over Stefan Simonsson 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 Stockholm Open round of 64 7-5 1-6 6-1.
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| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Sammy Giammalva Jr | 7-5 1-6 6-1 | Stefan Simonsson | Match data | Nov 4, 1981* | R64 | Stockholm Open | 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.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Stefan Simonsson | #702 | #48 | 0 | 1,788 | 98 | 121 | 44.7% | 0 | 0 | 0 | 0 | 0 | 0 |
| Sammy Giammalva Jr | — | — | — | 1,803 | — | — | — | 0 | 0 | 0 | 0 | 2 | 0 |
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 | Stefan Simonsson | Sammy Giammalva Jr | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 17 | 1977 | 0–2 | 0.0% | — | 1,484 | 0 | 0 | — | — | — | — | — | — | — |
| 18 | 1978 | 1–1 | 50.0% | #340 | 1,502 | 0 | 0 | — | — | — | — | — | — | — |
| 19 | 1979 | 8–8 | 50.0% | #137 | 1,573 | 0 | 0 | — | — | — | — | — | — | — |
| 20 | 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 | 24–19 | 55.8% | #61 | 1,675 | 0 | 0 | — | — | — | — | — | — | — |
| 24 | 1984 | 17–22 | 43.6% | #119 | 1,676 | 0 | 0 | — | — | — | — | — | — | — |
| 25 | 1985 | 10–16 | 38.5% | #162 | 1,620 | 0 | 0 | — | — | — | — | — | — | — |
| 26 | 1986 | 0–4 | 0.0% | #354 | 1,546 | 0 | 0 | — | — | — | — | — | — | — |
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 | Stefan Simonsson | Sammy Giammalva Jr | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Hard | Clay | Grass | Carpet | Yr | Hard | Clay | Grass | Carpet | |||||||||||||||||||||||||
| 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% | — | — | — | — | — | — | — | — | 1980 | 6 | 3 | 9 | 66.7% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 18 | 1978 | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | 1981 | 13 | 8 | 21 | 61.9% | 8 | 7 | 15 | 53.3% | — | — | — | — | 2 | 5 | 7 | 28.6% |
| 19 | 1979 | 3 | 2 | 5 | 60.0% | 3 | 5 | 8 | 37.5% | — | — | — | — | 2 | 1 | 3 | 66.7% | 1982 | 0 | 3 | 3 | 0.0% | 1 | 5 | 6 | 16.7% | 6 | 3 | 9 | 66.7% | 1 | 4 | 5 | 20.0% |
| 20 | 1980 | 1 | 3 | 4 | 25.0% | 10 | 12 | 22 | 45.5% | 0 | 1 | 1 | 0.0% | 1 | 3 | 4 | 25.0% | 1983 | 11 | 10 | 21 | 52.4% | 6 | 5 | 11 | 54.5% | 2 | 3 | 5 | 40.0% | 5 | 2 | 7 | 71.4% |
| 21 | 1981 | 1 | 2 | 3 | 33.3% | 4 | 7 | 11 | 36.4% | — | — | — | — | 0 | 1 | 1 | 0.0% | 1984 | 8 | 7 | 15 | 53.3% | 3 | 4 | 7 | 42.9% | 3 | 2 | 5 | 60.0% | 1 | 2 | 3 | 33.3% |
| 22 | 1982 | 6 | 5 | 11 | 54.5% | 13 | 13 | 26 | 50.0% | 2 | 1 | 3 | 66.7% | 0 | 1 | 1 | 0.0% | 1985 | 10 | 8 | 18 | 55.6% | — | — | — | — | 4 | 4 | 8 | 50.0% | 4 | 5 | 9 | 44.4% |
| 23 | 1983 | 8 | 8 | 16 | 50.0% | 14 | 8 | 22 | 63.6% | 1 | 1 | 2 | 50.0% | 1 | 2 | 3 | 33.3% | 1986 | 6 | 8 | 14 | 42.9% | 3 | 3 | 6 | 50.0% | 2 | 2 | 4 | 50.0% | 3 | 4 | 7 | 42.9% |
| 24 | 1984 | 2 | 6 | 8 | 25.0% | 9 | 11 | 20 | 45.0% | 5 | 3 | 8 | 62.5% | 1 | 2 | 3 | 33.3% | 1987 | 4 | 8 | 12 | 33.3% | 2 | 3 | 5 | 40.0% | 4 | 3 | 7 | 57.1% | 5 | 5 | 10 | 50.0% |
| 25 | 1985 | 1 | 3 | 4 | 25.0% | 9 | 12 | 21 | 42.9% | 0 | 1 | 1 | 0.0% | — | — | — | — | 1988 | 7 | 8 | 15 | 46.7% | 2 | 2 | 4 | 50.0% | 3 | 3 | 6 | 50.0% | 4 | 2 | 6 | 66.7% |
| 26 | 1986 | — | — | — | — | 0 | 2 | 2 | 0.0% | 0 | 1 | 1 | 0.0% | 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% |
| Career | — | 23 | 31 | 54 | 42.6% | 62 | 71 | 133 | 46.6% | 8 | 8 | 16 | 50.0% | 5 | 11 | 16 | 31.2% | — | 69 | 68 | 137 | 50.4% | 25 | 32 | 57 | 43.9% | 24 | 23 | 47 | 51.1% | 26 | 29 | 55 | 47.3% |
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 | Stefan Simonsson | 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 | 1977 | 1485 | 101.7 | — | — | — | — | — | — | — | 20.0% | -3.00 | 0–1 | — | — | -0.03 | 1980 | 1608 | 127.7 | — | — | — | — | +76 | — | — | 50.0% | -0.03 | 3–0 (100%) | 1–0 | — | +0.70 |
| 18 | 1978 | 1503 | 109.9 | — | — | — | — | — | — | — | 50.0% | 0.00 | — | — | — | -0.02 | 1981 | 1672 | 132.0 | — | — | — | — | +26 | -93 | — | 50.0% | -0.02 | 15–10 (60%) | 8–8 (50%) | 103.8 | +2.44 |
| 19 | 1979 | 1573 | 120.2 | — | — | — | — | +59 | -53 | — | 54.1% | -0.03 | 1–4 (20%) | 6–1 (86%) | 101.6 | +1.36 | 1982 | 1623 | 123.4 | — | — | — | — | -32 | -90 | +29 | 41.3% | -0.35 | 4–8 (33%) | 3–7 (30%) | 94.9 | +1.50 |
| 20 | 1980 | 1544 | 125.2 | — | — | — | — | +24 | +16 | — | 39.5% | -0.49 | 6–6 (50%) | 2–2 (50%) | — | +1.54 | 1983 | 1701 | 132.6 | — | — | — | — | -1 | -112 | -28 | 53.3% | -0.09 | 7–7 (50%) | 8–4 (67%) | 103.1 | +2.18 |
| 21 | 1981 | 1526 | 115.7 | — | — | — | — | +17 | +34 | — | 37.1% | -0.63 | 2–5 (29%) | 0–2 | — | +0.91 | 1984 | 1715 | 139.4 | — | — | — | — | -12 | -117 | +2 | 47.1% | -0.23 | 6–2 (75%) | 3–3 (50%) | 105.8 | -0.79 |
| 22 | 1982 | 1704 | 136.7 | — | — | — | — | -82 | -48 | -110 | 50.0% | -0.02 | 4–6 (40%) | 6–6 (50%) | 100.7 | -0.71 | 1985 | 1737 | 142.0 | — | — | — | — | +7 | — | +16 | 50.6% | +0.04 | 3–2 (60%) | 8–3 (73%) | 106.1 | -0.64 |
| 23 | 1983 | 1675 | 131.1 | — | — | — | — | -53 | +65 | — | 52.4% | -0.06 | 8–5 (62%) | 7–4 (64%) | 105.9 | +1.84 | 1986 | 1740 | 140.4 | — | — | — | — | -9 | -120 | -6 | 48.8% | +0.15 | 4–6 (40%) | 3–1 (75%) | 100.4 | -1.68 |
| 24 | 1984 | 1676 | 134.5 | — | — | — | — | -75 | -4 | +37 | 47.2% | -0.28 | 5–11 (31%) | 8–3 (73%) | 99.1 | +0.29 | 1987 | 1644 | 128.6 | — | — | — | — | +2 | -40 | +94 | 43.4% | -0.45 | 4–4 (50%) | 5–6 (45%) | 97.9 | +0.11 |
| 25 | 1985 | 1620 | 130.1 | — | — | — | — | -54 | +24 | — | 42.6% | -0.44 | 3–6 (33%) | 3–5 (38%) | 97.1 | -1.32 | 1988 | 1653 | 124.7 | — | — | — | — | -2 | -43 | +53 | 51.8% | +0.13 | 7–6 (54%) | 5–6 (45%) | 97.8 | +0.72 |
| 26 | 1986 | 1546 | 94.2 | — | — | — | — | — | — | — | 20.0% | -2.30 | 0–2 | — | — | +0.69 | 1989 | 1582 | 113.0 | — | — | — | — | +68 | — | +50 | 35.9% | -0.54 | 2–2 (50%) | 0–3 (0%) | 96.8 | +0.53 |
| Career | — | 1789 | 134.5 | — | — | — | — | -35 | +7 | -3 | 46.2% | -0.31 | 29–46 (39%) | 32–23 (58%) | 102.1 | +2.08 | — | 1804 | 139.2 | — | — | — | — | +8 | -94 | +29 | 48.1% | -0.11 | 55–47 (54%) | 44–41 (52%) | 103.6 | +1.72 |
Each player's five most-played main-draw opponents. The current matchup is highlighted when it appears in a player's top five.
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Mats Wilander | 0 | 5 | 5 | Feb 6, 1985 | H2H |
| Shlomo Glickstein | 2 | 2 | 4 | Nov 28, 1984 | H2H |
| Jose Luis Clerc | 0 | 4 | 4 | Apr 27, 1984 | H2H |
| Guy Forget | 1 | 2 | 3 | Sep 26, 1985 | H2H |
| Claudio Mezzadri | 2 | 1 | 3 | Jul 25, 1985 | H2H |
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Scott Davis | 3 | 3 | 6 | Jul 9, 1987 | — |
| Bill Scanlon | 2 | 3 | 5 | Feb 15, 1989 | — |
| Tim Mayotte | 2 | 3 | 5 | Sep 3, 1987 | — |
| Jimmy Connors | 0 | 5 | 5 | Nov 20, 1986 | — |
| Ivan Lendl | 0 | 5 | 5 | Mar 28, 1986 | — |