RallyIQ

WTA · Right-handed · 6 charted matches · 2019–2022

Bibiane Schoofs

Against an average opponent

Serve points won 52.2% ±3.9 raw 47.9% · tour 56.3% · 376 points
Return points won 41.4% ±3.9 raw 40.3% · tour 43.7% · 347 points

Serve and return points won, refitted against every opponent at once so a record built on weak or strong opposition is put on the same scale. Career, all surfaces, with a 90% margin. Raw is the plain share of points won.

Value per 100 shots

Direction choice −0.16 ±0.18 better than 24% of WTA · raw −0.13
Shot selection −0.47 ±0.26 better than 12% of WTA · raw −0.42
Execution −2.62 ±1.32 better than 2% of WTA · raw −2.23

Points gained per 100 shots compared with an average tour player in the same position, adjusted for the strength of the opponents faced, with a 90% margin (shots clustered by match). Raw is before the opponent adjustment. Built on 2,199 shots.

Shot expected value

The share of points Bibiane Schoofs goes on to win after each option in the positions they face most often, shrunk toward tour average when the sample is small. Showing the 8 most-used options; teal marks the best one with at least 30 shots.

Rally, shots 5–8: drive to your middle

position worth 50% to the average player · 179 shots

OptionUsedWin %Tour
FH crosscourt 27% 42.8%±9.8 52.7%
FH down the line 21% 49.9%±10.9 52.2%
FH through the middle 17% 44.3%±11.6 45.8%
BH through the middle 14% 38.3%±11.9 46.2%
BH crosscourt 8% 56.4%±14.0 50.9%
BH slice through the middle 6% 45.1%±14.7 44.8%

Rally, shots 5–8: drive to your backhand side

position worth 45% to the average player · 118 shots

OptionUsedWin %Tour
BH slice crosscourt 30% 36.5%±10.7 40.4%
BH through the middle 26% 40.5%±11.3 43.3%
BH crosscourt 24% 51.1%±11.9 47.6%
BH slice through the middle 11% 36.0%±13.7 34.4%

Rally, shots 5–8: drive to your forehand side

position worth 43% to the average player · 105 shots

OptionUsedWin %Tour
FH crosscourt 54% 36.8%±9.0 46.7%
FH through the middle 27% 40.1%±11.6 41.3%
FH down the line 14% 48.5%±13.9 44.9%

Serve +1: mid-depth return to your middle

position worth 51% to the average player · 74 shots

OptionUsedWin %Tour
FH crosscourt 27% 44.5%±12.9 54.0%
FH through the middle 23% 43.5%±13.4 45.5%
FH down the line 16% 45.8%±14.5 53.3%
BH through the middle 15% 42.8%±14.6 46.3%

Serve under pressure

Pressure predictability index +8 How much less varied Bibiane Schoofs's first-serve direction gets on break points. Positive means easier to read. Based on 62 break-point first serves.

Deuce court

1st serveUsageBreak ptWon when in
Wide 32% 41% ▲ 62% / 66%
Body 34% 35% 47% / 57%
T 34% 24% ▼ 65% / 68%

178 normal · 17 break-point 1st serves

Ad court

1st serveUsageBreak ptWon when in
Wide 41% 58% ▲ 61% / 66%
Body 30% 22% 51% / 56%
T 29% 20% ▼ 55% / 64%

135 normal · 45 break-point 1st serves

Is the serve mix in equilibrium?

Game theory says a well-mixed server wins equally often with every direction they use. If one direction wins more, it's underused and points are being left behind. This is the minimax test Walker and Wooders ran on Wimbledon finals, applied to every charted first serve. Win rates include faults. "Optimal" allows for returners reading a habit. A direction loses 0.19 points per 100 serves for every 10 points of habitual usage, measured from WTA servers whose mix drifted between matches. Shifts stay within the range servers' habits actually vary, the only range that response was measured over.

Deuce court

1st serveUsagePoints won
Wide33% 50.9%±8.5 n=64
Body34% 40.3%±8.2 n=67
T33% 45.9%±8.5 n=64

Consistent with an optimal mix (p = 0.17).

Ad court

1st serveUsagePoints won
Wide46% 49.1%±7.8 n=82
Body28% 50.2%±9.2 n=50
T27% 51.1%±9.3 n=48

Consistent with an optimal mix (p = 0.93).

Repeating the previous direction to the same court: +4.2±12.3 points per 100 against switching. Negative means returners read repeats. Tour-wide, repeating costs women about 0.4 points per 100 and costs men nothing, so men's returners don't measurably anticipate direction. (123 repeats, 240 switches.)

Return by serve direction

Return points won against each serve direction, compared with the tour average.

ServeCourtDirectionPointsWonvs tour
1stAd courtBody 35 45% +1.0±10.1
1stAd courtT 31 40% +4.9±10.3
1stAd courtWide 35 37% +3.0±9.9
1stDeuce courtBody 22 50% +7.0±11.4
1stDeuce courtT 19 26% −6.3±10.3
1stDeuce courtWide 61 29% −5.2±7.8
2ndAd courtBody 30 51% −4.2±10.6
2ndAd courtT 13 50% −5.0±12.5
2ndAd courtWide 24 48% −5.3±11.2
2ndDeuce courtBody 46 48% −6.6±9.4
2ndDeuce courtT 19 51% −5.4±11.7
2ndDeuce courtWide 12 55% +1.3±12.6

Signature patterns

Recurring sequences that win more than Bibiane Schoofs's own baseline, ranked by edge weighted by how often they're used.

Serve → +1

  1. Not enough data

Return

  1. Not enough data

Rally, consecutive own shots

  1. FH crosscourt → FH crosscourt used 8.6% · won 40% · −1.5±11.5 vs own baseline
  2. FH through the middle → FH crosscourt used 10.2% · won 37% · −4.4±10.8 vs own baseline

Discovered sequences

Mined from every me → opponent → me run of three shots, with no templates. Ranked by how much more often Bibiane Schoofs wins the point once the sequence happens, weighted by how often it happens. Think of them as chess openings.

  1. FH crosscourt → FH crosscourt → FH crosscourt used 1.6% · won 48% · +5.5±12.6 vs own baseline · +7.3 vs tour on the same sequence Disrupted by Suzan Lamens (4/7)

Strengths and vulnerabilities

Value per 100 shots compared with the average player hitting (strengths) or facing (vulnerabilities) the same shot. Only shot types seen at least 120 times.

Hurts opponents most with

FH to their backhand · rally−3.7166
FH to their forehand · rally−4.0156

Most exposed to

BH to the middle · rally+0.5128
FH to their forehand · rally+0.7144

Active players who are best at the shot in the top weakness: Darja Vidmanova, Caroline Wozniacki, Katie Volynets, Anna Karolina Schmiedlova, Marie Bouzkova

Charted matches