H2H data updated: 2026-09-14 00:00 UTC

Meghann Shaughnessy vs Mariana Diaz-Oliva H2H: 1-0

Meghann Shaughnessy holds a 1–0 lead over Mariana Diaz-Oliva in their WTA head-to-head. Across 1 main-draw meeting, Meghann Shaughnessy leads 1–0 on clay. Most recently, Meghann Shaughnessy won the 2006 Acapulco round of 32 6-1 6-0.

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Meghann Shaughnessy
USA Age 47 Right-Handed 180 cm / 5'11"
H2H
1 – 0
1 main-draw meetings
Mariana Diaz-Oliva
ARG Age 50 Right-Handed 172 cm / 5'8"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Meghann Shaughnessy #92 6-1 6-0 Mariana Diaz-Oliva #63 Match data Mar 2, 2006* R32 Acapulco Tier III → modern equivalent WTA 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
Meghann Shaughnessy #1,104 #11 1,949 1,903 233 233 50.0% 0 0 0 0 6 6
Mariana Diaz-Oliva #452 #42 696 1,652 86 130 39.8% 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 Meghann Shaughnessy Mariana Diaz-Oliva
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
17 1996 3–4 42.9% #165 1,511 0 0 — — — — — — —
18 1997 0–1 0.0% #198 1,499 0 0 — — — — — — —
19 1998 8–9 47.1% #69 1,544 0 0 — — — — — — —
20 1999 10–22 31.2% #99 1,438 0 0 1996 0–1 0.0% #140 1,485 0 0
21 2000 23–20 53.5% #38 1,651 0 1 1997 2–7 22.2% #106 1,455 0 0
22 2001 45–25 64.3% #12 1,832 0 2 1998 6–9 40.0% #95 1,470 0 0
23 2002 29–27 51.8% #30 1,738 0 2 1999 9–11 45.0% #107 1,510 0 0
24 2003 32–23 58.2% #17 1,729 0 3 2000 4–8 33.3% #112 1,499 0 0
25 2004 20–22 47.6% #40 1,662 0 3 2001 18–22 45.0% #55 1,548 0 0
26 2005 17–25 40.5% #66 1,566 0 3 2002 11–15 42.3% #89 1,567 0 1
27 2006 27–20 57.4% #37 1,709 0 5 2003 4–4 50.0% #172 1,581 0 1
28 2007 18–22 45.0% #52 1,666 0 6 2004 5–10 33.3% #102 1,539 0 1
29 2008 0–5 0.0% #836 1,579 0 6 2005 22–23 48.9% #58 1,606 0 1
30 2009 1–8 11.1% #590 1,533 0 6 2006 5–20 20.0% #192 1,460 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 Meghann Shaughnessy Mariana Diaz-Oliva
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 1996 0 1 1 0.0% 2 1 3 66.7% — — — — 1 2 3 33.3% — — — — — — — — — — — — — — — — —
18 1997 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
19 1998 4 5 9 44.4% 4 3 7 57.1% — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — —
20 1999 2 7 9 22.2% 5 11 16 31.3% 2 3 5 40.0% 1 1 2 50.0% 1996 — — — — 0 1 1 0.0% — — — — — — — —
21 2000 15 10 25 60.0% 6 6 12 50.0% 2 3 5 40.0% 0 1 1 0.0% 1997 0 1 1 0.0% 2 5 7 28.6% 0 1 1 0.0% — — — —
22 2001 18 14 32 56.3% 15 7 22 68.2% 5 2 7 71.4% 7 2 9 77.8% 1998 0 3 3 0.0% 5 5 10 50.0% 1 1 2 50.0% — — — —
23 2002 16 15 31 51.6% 6 7 13 46.2% 3 2 5 60.0% 4 3 7 57.1% 1999 0 1 1 0.0% 8 9 17 47.1% 1 1 2 50.0% — — — —
24 2003 26 13 39 66.7% 6 5 11 54.5% 0 2 2 0.0% 0 3 3 0.0% 2000 1 2 3 33.3% 3 6 9 33.3% — — — — — — — —
25 2004 14 16 30 46.7% 4 5 9 44.4% 2 1 3 66.7% — — — — 2001 4 8 12 33.3% 14 12 26 53.8% 0 2 2 0.0% — — — —
26 2005 9 15 24 37.5% 4 7 11 36.4% 4 3 7 57.1% — — — — 2002 4 7 11 36.4% 7 7 14 50.0% 0 1 1 0.0% — — — —
27 2006 14 13 27 51.9% 12 6 18 66.7% 1 1 2 50.0% — — — — 2003 0 2 2 0.0% 4 2 6 66.7% — — — — — — — —
28 2007 7 13 20 35.0% 10 6 16 62.5% 1 2 3 33.3% 0 1 1 0.0% 2004 4 7 11 36.4% 1 3 4 25.0% — — — — — — — —
29 2008 0 2 2 0.0% 0 3 3 0.0% — — — — — — — — 2005 8 11 19 42.1% 12 10 22 54.5% 2 2 4 50.0% — — — —
30 2009 1 8 9 11.1% — — — — — — — — — — — — 2006 3 10 13 23.1% 2 8 10 20.0% 0 2 2 0.0% — — — —
Career — 126 133 259 48.6% 74 67 141 52.5% 20 19 39 51.3% 13 14 27 48.1% — 24 52 76 31.6% 58 68 126 46.0% 4 10 14 28.6% — — — —

Performance Progression by Age

Seasons are aligned by the age each player spent most of that calendar year. Detailed serve and return statistics available for 94/240 of Meghann Shaughnessy's and 22/85 of Mariana Diaz-Oliva's main draw matches. Sample is shown as matches with detailed serve and return statistics / total main draw matches. Bold green marks the stronger value when both stat samples contain at least 5 matches; lower is better for DFs/M.

Age Meghann Shaughnessy Mariana Diaz-Oliva
Yr Sample Aces/M DFs/M 1st Sv% 1st Pts% 2nd Pts% BP Saved% BP Conv% Svc Pts% Ret Pts% Yr Sample Aces/M DFs/M 1st Sv% 1st Pts% 2nd Pts% BP Saved% BP Conv% Svc Pts% Ret Pts%
24 2003 8/55 5.0 4.4 51.4% 71.2% 47.2% 53.9% 49.8% 59.4% 40.4% — —/— — — — — — — — — —
25 2004 6/42 6.5 6.7 50.5% 72.4% 42.1% 59.3% 38.6% 57.5% 39.3% — —/— — — — — — — — — —
26 2005 11/42 9.1 4.0 54.9% 77.0% 49.1% 57.4% 45.9% 64.4% 39.2% — —/— — — — — — — — — —
27 2006 21/47 4.4 5.3 55.4% 68.5% 45.4% 54.3% 38.1% 57.9% 39.9% — —/— — — — — — — — — —
28 2007 34/40 4.5 3.9 54.5% 70.0% 45.4% 56.8% 37.8% 58.6% 39.4% 2004 3/15 0.7 3.7 69.2% 52.5% 43.8% 53.5% 45.2% 49.9% 42.9%
29 2008 5/5 3.0 3.0 54.3% 56.9% 45.0% 58.1% 50.8% 51.2% 37.7% 2005 6/45 0.8 4.0 63.2% 57.4% 42.2% 56.9% 54.7% 51.7% 47.7%
30 2009 9/9 5.1 2.6 46.3% 64.4% 45.7% 49.6% 31.2% 54.0% 33.6% 2006 13/25 1.1 3.8 66.1% 55.4% 37.1% 55.1% 46.9% 49.0% 44.1%
Career — 94/466 5.2 4.2 53.4% 69.5% 45.8% 55.6% 39.9% 58.3% 38.9% — 22/216 1.0 3.9 65.8% 55.5% 39.4% 55.4% 48.8% 49.9% 44.9%

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 Meghann Shaughnessy Mariana Diaz-Oliva
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 1996 1512 107.9 — — — — +9 +65 — 47.1% 0.00 1–2 (33%) — — +0.72 — — — — — — — — — — — — — — — —
18 1997 1499 96.7 — — — — — — — 33.3% -2.33 0–1 — — +0.03 — — — — — — — — — — — — — — — —
19 1998 1544 115.4 — — — — -48 +81 — 46.2% -0.03 3–2 (60%) 0–2 — +0.65 — — — — — — — — — — — — — — — —
20 1999 1439 99.7 — — — — +16 +55 +130 36.5% -0.77 3–7 (30%) 3–5 (38%) 93.7 +2.27 1996 1486 100.0 — — — — — — — 33.3% -0.67 0–1 — — +0.07
21 2000 1652 133.2 — — — — -10 -80 -108 54.2% +0.11 4–6 (40%) 7–6 (54%) 102.1 +0.56 1997 1456 102.2 — — — — — +55 — 25.0% -1.38 0–2 0–2 — +0.10
22 2001 1832 151.0 — — — — -45 -52 -141 59.9% +0.71 15–6 (71%) 15–11 (58%) 110.5 +1.29 1998 1471 104.3 — — — — +8 +58 — 43.3% -0.47 1–1 3–3 (50%) — +1.39
23 2002 1738 139.5 — — — — +19 -30 -36 51.6% +0.17 9–9 (50%) 5–6 (45%) 94.1 +0.83 1999 1511 99.1 — — — — — +15 — 41.3% -0.44 5–1 (83%) 3–2 (60%) 105.7 +1.34
24 2003 1730 144.7 +2.14 -0.89 0.995 50.1% +45 -9 — 57.6% +0.54 9–8 (53%) 7–10 (41%) 96.1 +1.17 2000 1500 102.9 — — — — -35 +12 — 33.3% -0.89 2–3 (40%) 3–4 (43%) 98.0 +0.33
25 2004 1662 135.5 +1.00 -1.59 0.925 48.6% +19 +57 -22 50.0% +0.18 5–7 (42%) 5–8 (38%) 96.1 +1.24 2001 1548 115.4 — — — — -74 +72 — 42.7% -0.76 7–4 (64%) 4–1 (80%) 108.0 -0.32
26 2005 1566 122.3 +4.57 -2.35 1.103 51.7% +20 +69 +81 44.8% -0.34 4–9 (31%) 7–6 (54%) 94.8 +0.33 2002 1568 108.2 — — — — -86 +51 — 46.4% -0.36 2–4 (33%) 1–4 (20%) 95.3 -0.04
27 2006 1709 130.5 +1.38 -2.93 0.947 48.9% -49 +14 — 55.0% +0.25 9–6 (60%) 4–1 (80%) 107.6 -1.20 2003 1581 107.7 — — — — — +98 — 37.5% -0.06 2–0 1–2 (33%) — +0.45
28 2007 1666 128.5 +1.99 -3.46 0.952 49.3% -76 +156 -17 47.7% -0.09 4–6 (40%) 3–6 (33%) 96.4 +0.26 2004 1540 108.8 -1.83 -0.74 0.856 46.7% -69 +94 — 32.4% -1.12 3–1 (75%) 2–2 (50%) 102.8 -0.24
29 2008 1580 93.2 -2.35 -2.24 0.773 45.3% — +131 — 14.3% -2.86 0–1 — — -0.09 2005 1606 122.7 -1.27 +1.04 0.989 50.0% -69 +54 -120 48.4% -0.26 7–4 (64%) 6–6 (50%) 106.4 -0.48
30 2009 1534 114.6 -0.18 -4.49 0.730 44.3% -22 — — 23.8% -2.14 0–3 (0%) — — -0.71 2006 1460 104.0 -4.32 -0.65 0.866 46.5% +14 +88 — 28.8% -1.46 2–9 (18%) 2–5 (29%) 90.3 0.00
Career — 1904 137.9 +1.67 -2.91 0.933 48.8% -6 +25 -17 50.9% +0.08 66–73 (47%) 56–61 (48%) 95.9 +1.59 — 1653 112.9 -3.15 -0.20 0.897 47.5% -53 +56 -120 40.3% -0.68 31–30 (51%) 25–31 (45%) 100.1 +1.21

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.