RallyIQ

WTA · Right-handed · 2 charted matches · 2009–2011

Virginie Razzano

Shot expected value

The share of points Virginie Razzano 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 forehand side

position worth 43% to the average player · 47 shots

OptionUsedWin %Tour
FH crosscourt 53% 49.7%±12.3 46.7%
FH down the line 32% 42.8%±13.8 44.9%

Serve under pressure

Deuce court

1st serveUsageBreak ptWon when in
Wide 55% 100% ▲ 59% / 66%
Body 17% 0% ▼ 54% / 57%
T 28% 0% ▼ 68% / 68%

64 normal · 2 break-point 1st serves

Ad court

1st serveUsageBreak ptWon when in
Wide 50% 53% 71% / 66%
Body 20% 40% ▲ 52% / 56%
T 30% 7% ▼ 59% / 64%

44 normal · 15 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
Wide56% 54.8%±10.0 n=37
Body17% 53.0%±12.8 n=11
T27% 60.4%±11.6 n=18

Consistent with an optimal mix (p = 0.43).

Return by serve direction

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

ServeCourtDirectionPointsWonvs tour
1stAd courtBody 3 43% −1.0±14.2
1stAd courtT 10 32% −3.9±12.1
1stAd courtWide 17 26% −8.2±10.6
1stDeuce courtBody 7 37% −5.4±13.1
1stDeuce courtT 16 34% +1.9±11.5
1stDeuce courtWide 14 25% −8.6±10.8
2ndAd courtBody 2 58% +2.8±14.4
2ndAd courtT 3 56% +1.1±14.2
2ndAd courtWide 13 44% −9.2±12.5
2ndDeuce courtBody 13 50% −4.8±12.5
2ndDeuce courtT 1 54% −1.8±14.7
2ndDeuce courtWide 4 50% −3.4±14.1

Charted matches