H2H data updated: 2026-09-03 00:00 UTC

Michael Robertson vs Pieter Aldrich H2H: 0-1

Pieter Aldrich holds a 1–0 lead over Michael Robertson in their ATP head-to-head. Across 1 main-draw meeting, Pieter Aldrich leads 1–0 on hard courts. Most recently, Pieter Aldrich won the 1986 South African Open round of 32 4-6 6-3 6-2.

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Michael Robertson
USA Age 63 Right-Handed 185 cm / 6'1"
H2H
0 – 1
1 main draw meetings
Pieter Aldrich
RSA Age 60 Right-Handed 180 cm / 5'11"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Pieter Aldrich #363 4-6 6-3 6-2 Michael Robertson #177 Match data Nov 20, 1986* R32 South African 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.

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
Michael Robertson #598 #101 139 1,590 23 46 33.3% 0 0 0 0 0 0
Pieter Aldrich #1,122 #64 256 1,675 36 40 47.4% 0 0 0 0 1 1

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 Michael Robertson Pieter Aldrich
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
18 1982 0–1 0.0% #826 1,498 0 0 — — — — — — —
20 — — — — — — — 1986 1–1 50.0% #275 1,512 0 0
21 1985 5–7 41.7% #168 1,526 0 0 1987 1–1 50.0% #134 1,535 0 0
22 1986 5–10 33.3% #203 1,483 0 0 1988 15–15 50.0% #68 1,662 0 0
23 1987 1–5 16.7% #223 1,453 0 0 1989 13–19 40.6% #125 1,619 0 0
24 1988 6–10 37.5% #181 1,493 0 0 1990 6–4 60.0% #192 1,663 0 1
25 1989 5–9 35.7% #167 1,506 0 0 — — — — — — —
26 1990 1–2 33.3% #268 1,509 0 0 — — — — — — —
27 1991 0–2 0.0% #311 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 Michael Robertson Pieter Aldrich
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 %
18 1982 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
20 — — — — — — — — — — — — — — — — — 1986 1 1 2 50.0% — — — — — — — — — — — —
21 1985 3 4 7 42.9% 0 2 2 0.0% 2 1 3 66.7% — — — — 1987 1 1 2 50.0% — — — — — — — — — — — —
22 1986 3 2 5 60.0% 1 5 6 16.7% 0 2 2 0.0% 1 1 2 50.0% 1988 11 10 21 52.4% 0 1 1 0.0% 4 4 8 50.0% — — — —
23 1987 0 3 3 0.0% 1 1 2 50.0% 0 1 1 0.0% — — — — 1989 8 11 19 42.1% — — — — 3 4 7 42.9% 2 4 6 33.3%
24 1988 5 8 13 38.5% 1 1 2 50.0% — — — — 0 1 1 0.0% 1990 0 3 3 0.0% — — — — 5 0 5 100.0% 1 1 2 50.0%
25 1989 4 6 10 40.0% 1 2 3 33.3% 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — —
26 1990 1 1 2 50.0% — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — —
27 1991 — — — — 0 1 1 0.0% — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — —
Career — 16 25 41 39.0% 4 12 16 25.0% 2 6 8 25.0% 1 3 4 25.0% — 21 26 47 44.7% 0 1 1 0.0% 12 8 20 60.0% 3 5 8 37.5%

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 Michael Robertson Pieter Aldrich
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
18 1982 1498 108.9 — — — — — — — 0.0% -3.00 — — — -0.23 — — — — — — — — — — — — — — — —
20 — — — — — — — — — — — — — — — — 1986 1513 110.1 — — — — — — — 50.0% +0.17 1–1 — — +0.09
21 1985 1526 110.3 — — — — +24 — +64 39.3% -0.72 3–1 (75%) 3–2 (60%) — +0.92 1987 1536 112.9 — — — — — — — 50.0% -1.00 — — — -0.32
22 1986 1484 109.6 — — — — +89 -6 — 39.5% -0.92 1–4 (20%) 7–5 (58%) — +1.32 1988 1662 129.6 — — — — +17 — -56 51.3% -0.08 5–6 (45%) 7–7 (50%) — +0.62
23 1987 1453 101.4 — — — — +80 — — 26.3% -1.05 1–1 1–3 (25%) — +0.35 1989 1620 119.5 — — — — +5 — -29 43.3% -0.48 7–7 (50%) 4–4 (50%) — +0.20
24 1988 1493 128.5 — — — — +34 — — 42.1% -0.24 1–4 (20%) 3–4 (43%) — -0.48 1990 1664 118.5 — — — — -66 — +47 52.2% +0.04 2–0 2–1 (67%) — +0.37
25 1989 1506 118.7 — — — — +30 -16 — 37.8% -0.27 3–3 (50%) 3–5 (38%) — +0.36 — — — — — — — — — — — — — — — —
26 1990 1510 107.2 — — — — — — — 44.4% +0.44 0–1 0–1 — -0.07 — — — — — — — — — — — — — — — —
27 1991 1495 104.2 -1.95 -0.48 0.651 40.2% — — — 0.0% -3.20 — 0–1 — -0.12 — — — — — — — — — — — — — — — —
Career — 1590 121.5 -1.95 -0.48 0.651 40.2% +44 -9 +64 36.9% -0.64 9–14 (39%) 17–21 (45%) 97.1 +2.97 — 1676 127.4 — — — — +3 — -21 47.8% -0.25 15–14 (52%) 13–12 (52%) 101.1 +1.26

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.