H2H data updated: 2026-09-13 00:00 UTC

Els Callens vs Kimberly Po Messerli H2H: 1-0

Els Callens holds a 1–0 lead over Kimberly Po Messerli in their WTA head-to-head. Across 1 main-draw meeting, Els Callens leads 1–0 on carpet. Most recently, Els Callens won the 1999 Pan Pacific Open round of 32 6-3 6-1.

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

Els Callens
BEL Age 56 Right-Handed 178 cm / 5'10"
H2H
1 – 0
1 main-draw meetings
Kimberly Po Messerli
USA Age 54 Right-Handed 160 cm / 5'3"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Els Callens #86 6-3 6-1 Kimberly Po Messerli Match data Feb 4, 1999* R32 Pan Pacific Open Tier I → modern equivalent WTA 1000 Carpet

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
Els Callens #473 #43 582 1,715 83 128 39.3% 0 0 0 0 0 0
Kimberly Po Messerli — — — 1,879 118 133 47.0% 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 Els Callens Kimberly Po Messerli
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
17 — — — — — — — 1989 0–1 0.0% — 1,486 0 0
19 — — — — — — — 1991 5–4 55.6% — 1,568 0 0
20 1991 1–1 50.0% #168 1,509 0 0 1992 14–16 46.7% — 1,654 0 0
21 1992 0–1 0.0% #231 1,492 0 0 1993 20–19 51.3% — 1,776 0 0
22 1993 2–1 66.7% #188 1,513 0 0 1994 11–17 39.3% — 1,701 0 0
23 1994 4–3 57.1% #110 1,560 0 0 1995 4–13 23.5% — 1,609 0 0
24 1995 8–11 42.1% #95 1,551 0 0 1996 20–13 60.6% — 1,806 0 0
25 1996 13–12 52.0% #51 1,692 0 0 1997 27–20 57.4% — 1,790 0 0
26 1997 8–16 33.3% #98 1,579 0 0 1998 11–15 42.3% — 1,743 0 0
27 1998 2–8 20.0% #102 1,525 0 0 1999 6–13 31.6% — 1,653 0 0
28 1999 7–9 43.8% #82 1,569 0 0 2000 0–2 0.0% — 1,611 0 0
29 2000 8–13 38.1% #100 1,564 0 0 — — — — — — —
30 2001 2–6 25.0% #177 1,522 0 0 — — — — — — —
31 2002 9–10 47.4% #67 1,606 0 0 — — — — — — —
32 2003 13–19 40.6% #73 1,637 0 0 — — — — — — —
33 2004 5–15 25.0% #122 1,539 0 0 — — — — — — —
34 2005 1–3 25.0% #224 1,521 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 Els Callens Kimberly Po Messerli
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 — — — — — — — — — — — — — — — — — 1989 0 1 1 0.0% — — — — — — — — — — — —
19 — — — — — — — — — — — — — — — — — 1991 5 4 9 55.6% — — — — — — — — — — — —
20 1991 — — — — — — — — 1 1 2 50.0% — — — — 1992 9 10 19 47.4% 0 1 1 0.0% 4 3 7 57.1% 1 2 3 33.3%
21 1992 — — — — — — — — 0 1 1 0.0% — — — — 1993 10 9 19 52.6% 2 2 4 50.0% 2 3 5 40.0% 6 5 11 54.5%
22 1993 — — — — — — — — — — — — 2 1 3 66.7% 1994 3 6 9 33.3% 2 4 6 33.3% 1 2 3 33.3% 5 5 10 50.0%
23 1994 — — — — — — — — 1 1 2 50.0% 3 2 5 60.0% 1995 3 4 7 42.9% 0 5 5 0.0% 0 2 2 0.0% 1 2 3 33.3%
24 1995 1 4 5 20.0% 3 2 5 60.0% 4 1 5 80.0% 0 4 4 0.0% 1996 13 6 19 68.4% — — — — 1 2 3 33.3% 6 5 11 54.5%
25 1996 2 3 5 40.0% 1 2 3 33.3% 3 3 6 50.0% 7 4 11 63.6% 1997 21 13 34 61.8% 2 2 4 50.0% 1 2 3 33.3% 3 3 6 50.0%
26 1997 4 6 10 40.0% 1 3 4 25.0% 2 3 5 40.0% 1 4 5 20.0% 1998 5 8 13 38.5% 1 3 4 25.0% 4 2 6 66.7% 1 2 3 33.3%
27 1998 0 3 3 0.0% 1 1 2 50.0% 0 2 2 0.0% 1 2 3 33.3% 1999 3 6 9 33.3% 1 3 4 25.0% 2 2 4 50.0% 0 2 2 0.0%
28 1999 1 4 5 20.0% 4 2 6 66.7% 0 1 1 0.0% 2 2 4 50.0% 2000 — — — — — — — — 0 1 1 0.0% 0 1 1 0.0%
29 2000 5 6 11 45.5% 2 5 7 28.6% 1 2 3 33.3% — — — — — — — — — — — — — — — — — — — — —
30 2001 1 2 3 33.3% 1 2 3 33.3% — — — — 0 2 2 0.0% — — — — — — — — — — — — — — — — —
31 2002 4 3 7 57.1% 1 3 4 25.0% 2 2 4 50.0% 2 2 4 50.0% — — — — — — — — — — — — — — — — —
32 2003 4 7 11 36.4% 1 6 7 14.3% 4 3 7 57.1% 4 3 7 57.1% — — — — — — — — — — — — — — — — —
33 2004 3 9 12 25.0% 0 3 3 0.0% 1 2 3 33.3% 1 1 2 50.0% — — — — — — — — — — — — — — — — —
34 2005 1 2 3 33.3% — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — —
Career — 26 49 75 34.7% 15 29 44 34.1% 19 23 42 45.2% 23 27 50 46.0% — 72 67 139 51.8% 8 20 28 28.6% 15 19 34 44.1% 23 27 50 46.0%

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 Els Callens Kimberly Po Messerli
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 — — — — — — — — — — — — — — — — 1989 1486 97.5 — — — — — — — 0.0% -2.50 — 0–1 — +0.12
19 — — — — — — — — — — — — — — — — 1991 1568 120.4 — — — — +29 — — 56.5% -0.26 2–3 (40%) 1–0 — -0.01
20 1991 1509 97.7 — — — — — — — 40.0% -1.00 1–0 1–1 — +0.24 1992 1655 127.7 — — — — -8 — -30 45.6% -0.40 5–5 (50%) 4–2 (67%) 103.5 +0.99
21 1992 1493 94.9 — — — — — — — 0.0% -4.00 — — — +0.06 1993 1777 145.0 — — — — +17 -217 -153 50.0% -0.15 6–4 (60%) 5–2 (71%) 106.5 -0.91
22 1993 1514 102.8 — — — — +47 — — 57.1% +0.14 1–0 — — +0.46 1994 1702 128.7 — — — — +38 -143 -106 44.6% -0.51 4–7 (36%) 2–2 (50%) — -0.08
23 1994 1561 113.2 — — — — +25 — — 56.3% +0.63 1–1 1–0 — -0.16 1995 1610 120.0 — — — — +98 -130 — 29.7% -1.11 0–3 (0%) 1–3 (25%) 93.6 +0.25
24 1995 1551 116.0 — — — — -68 +43 +105 45.2% -0.24 1–3 (25%) 1–1 — +0.58 1996 1807 155.2 — — — — +52 — -239 57.5% +0.44 5–4 (56%) 1–1 — +0.41
25 1996 1692 128.2 — — — — -52 -110 +3 48.1% -0.30 4–2 (67%) 4–4 (50%) 103.8 +0.50 1997 1790 146.8 — — — — +28 -289 -240 55.0% +0.44 9–8 (53%) 7–2 (78%) 103.7 +1.04
26 1997 1579 109.4 — — — — +17 -21 +72 33.3% -1.26 4–4 (50%) 1–2 (33%) 99.4 +0.32 1998 1743 135.6 — — — — +16 -267 -100 44.8% -0.59 2–4 (33%) 4–1 (80%) 102.7 -0.85
27 1998 1525 102.8 — — — — +21 — — 34.8% -1.00 1–4 (20%) 1–1 — +0.31 1999 1653 120.4 — — — — +21 -179 -26 38.1% -1.00 0–4 (0%) 1–4 (20%) 93.6 -1.39
28 1999 1570 122.3 — — — — -17 +45 — 44.4% -0.08 2–2 (50%) 1–2 (33%) — +0.02 2000 1611 101.2 — — — — — — — 20.0% -1.00 0–1 0–2 — +0.12
29 2000 1565 124.4 — — — — +8 +10 -5 44.9% -0.06 1–6 (14%) 2–4 (33%) 93.3 -0.24 — — — — — — — — — — — — — — — —
30 2001 1523 118.1 — — — — +25 +26 — 33.3% -0.72 0–2 0–2 — -0.05 — — — — — — — — — — — — — — — —
31 2002 1606 123.2 — — — — +7 -75 -6 42.6% -0.40 7–2 (78%) 2–3 (40%) 105.1 -0.33 — — — — — — — — — — — — — — — —
32 2003 1637 127.2 -0.92 -1.45 0.759 44.5% +8 -178 +36 41.1% -0.48 5–4 (56%) 4–3 (57%) 102.9 -1.93 — — — — — — — — — — — — — — — —
33 2004 1539 102.6 -1.13 -2.60 0.779 44.6% +15 -107 +61 33.3% -1.44 2–6 (25%) 3–1 (75%) 97.1 -0.15 — — — — — — — — — — — — — — — —
34 2005 1522 96.0 -1.14 -3.36 0.793 46.2% +16 — — 25.0% -1.88 — 1–1 — +0.11 — — — — — — — — — — — — — — — —
Career — 1716 123.9 -1.05 -2.22 0.772 44.7% -2 -39 +39 41.1% -0.57 30–36 (45%) 22–25 (47%) 98.5 -0.12 — 1880 144.9 — — — — +29 -197 -111 47.9% -0.22 33–43 (43%) 26–20 (57%) 102.5 -0.12

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.