H2H data updated: 2026-09-06 00:00 UTC

Per Hjertquist vs Schalk Van Der Merwe H2H: 1-0

Per Hjertquist holds a 1–0 lead over Schalk Van Der Merwe in their ATP head-to-head. Across 1 main-draw meeting, Per Hjertquist leads 1–0 on clay. Most recently, Per Hjertquist won the 1980 Hamburg Open round of 64 3-6 6-0 6-0.

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Per Hjertquist
SWE Age 66 Right-Handed 183 cm / 6'0"
H2H
1 – 0
1 main-draw meetings
Schalk Van Der Merwe
RSA Right-Handed

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Per Hjertquist 3-6 6-0 6-0 Schalk Van Der Merwe Match data May 14, 1980* R64 Hamburg Open 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
Per Hjertquist #537 #68 0 1,749 55 70 44.0% 0 0 0 0 1 1
Schalk Van Der Merwe — — — 1,561 — — — 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 Per Hjertquist Schalk Van Der Merwe
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
16 1976 0–1 0.0% #310 1,490 0 0 — — — — — — —
17 1977 0–1 0.0% #322 1,479 0 0 — — — — — — —
18 1978 3–5 37.5% #244 1,518 0 0 — — — — — — —
19 1979 9–6 60.0% #97 1,638 0 0 — — — — — — —
20 1980 20–16 55.6% #76 1,749 0 1 — — — — — — —
21 1981 15–19 44.1% #88 1,637 0 1 — — — — — — —
22 1982 6–12 33.3% — 1,621 0 1 — — — — — — —
23 1983 2–7 22.2% #149 1,562 0 1 — — — — — — —
24 1984 0–3 0.0% #278 1,514 0 1 — — — — — — —

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 Per Hjertquist Schalk Van Der Merwe
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 1976 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
17 1977 0 1 1 0.0% — — — — — — — — — — — — 1978 0 1 1 0.0% — — — — — — — — — — — —
18 1978 1 1 2 50.0% 2 4 6 33.3% — — — — — — — — — — — — — — — — — — — — — — — — —
19 1979 4 2 6 66.7% 5 4 9 55.6% — — — — — — — — 1980 0 2 2 0.0% 0 1 1 0.0% — — — — — — — —
20 1980 5 4 9 55.6% 8 10 18 44.4% 0 1 1 0.0% 7 1 8 87.5% 1981 0 1 1 0.0% — — — — — — — — — — — —
21 1981 5 9 14 35.7% 10 9 19 52.6% — — — — 0 1 1 0.0% 1982 4 3 7 57.1% 1 4 5 20.0% 1 2 3 33.3% — — — —
22 1982 2 3 5 40.0% 3 7 10 30.0% — — — — 1 2 3 33.3% 1983 2 2 4 50.0% — — — — — — — — — — — —
23 1983 1 2 3 33.3% 1 4 5 20.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — —
24 1984 0 2 2 0.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
25 — — — — — — — — — — — — — — — — — 1986 1 1 2 50.0% — — — — — — — — — — — —
Career — 18 25 43 41.9% 29 39 68 42.6% 0 2 2 0.0% 8 4 12 66.7% — 7 10 17 41.2% 1 5 6 16.7% 1 2 3 33.3% — — — —

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 Per Hjertquist Schalk Van Der Merwe
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 1976 1490 97.2 — — — — — — — 0.0% -3.00 — — — +0.01 — — — — — — — — — — — — — — — —
17 1977 1479 94.9 — — — — — — — 0.0% -3.50 — — — +0.09 1978 1494 101.0 — — — — — — — 0.0% -3.50 — — — -0.07
18 1978 1519 125.1 — — — — — +29 — 47.6% -0.05 1–4 (20%) — — -0.32 — — — — — — — — — — — — — — — —
19 1979 1639 127.9 — — — — -29 -31 — 51.4% -0.19 6–1 (86%) 1–1 — +0.72 1980 1470 98.1 — — — — — — — 25.0% -2.38 0–2 — — -0.04
20 1980 1750 136.3 — — — — +25 -119 — 52.3% +0.19 6–3 (67%) 2–6 (25%) 100.0 +2.14 1981 1456 97.6 — — — — — — — 0.0% -2.50 — 0–1 — +0.23
21 1981 1638 123.2 — — — — +23 +23 — 42.9% -0.74 8–2 (80%) 4–6 (40%) 105.7 +1.83 1982 1527 115.7 — — — — +44 -41 +24 45.5% -0.14 3–4 (43%) 2–3 (40%) 100.6 +0.70
22 1982 1621 127.6 — — — — +53 -25 — 35.6% -0.78 3–2 (60%) 1–4 (20%) 99.1 -0.48 1983 1536 100.0 — — — — +40 — — 40.0% -1.40 2–0 1–0 — +0.40
23 1983 1563 106.4 — — — — +87 -12 — 32.0% -1.44 1–3 (25%) 2–0 — -0.01 — — — — — — — — — — — — — — — —
24 1984 1515 96.9 — — — — — — — 14.3% -2.00 0–1 — — +0.52 — — — — — — — — — — — — — — — —
25 — — — — — — — — — — — — — — — — 1986 1550 104.3 — — — — — — — 50.0% -0.25 — 1–0 — -0.05
Career — 1750 131.7 — — — — +26 -32 — 43.7% -0.49 25–16 (61%) 10–17 (37%) 103.7 +3.60 — 1561 108.9 — — — — +43 -41 +24 40.0% -0.75 5–6 (45%) 4–4 (50%) 100.9 +4.50

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.