RallyIQ

WTA · Right-handed · 3 charted matches · 2012–2022

Urszula Radwanska

Shot expected value

The share of points Urszula Radwanska 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 backhand side

position worth 45% to the average player · 54 shots

OptionUsedWin %Tour
BH crosscourt 28% 44.3%±13.8 47.6%
BH through the middle 24% 50.5%±14.3 43.3%
BH slice through the middle 19% 39.6%±14.7 34.4%
BH slice crosscourt 19% 33.6%±14.2 40.4%

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

position worth 43% to the average player · 52 shots

OptionUsedWin %Tour
FH crosscourt 60% 53.6%±11.5 46.7%
FH through the middle 29% 40.8%±13.7 41.3%

Serve under pressure

Deuce court

1st serveUsageBreak ptWon when in
Wide 46% 89% ▲ 63% / 66%
Body 29% 0% ▼ 53% / 57%
T 25% 11% ▼ 66% / 68%

106 normal · 9 break-point 1st serves

Ad court

1st serveUsageBreak ptWon when in
Wide 34% 23% ▼ 55% / 66%
Body 22% 41% ▲ 54% / 56%
T 44% 36% 61% / 64%

85 normal · 22 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
Wide50% 55.9%±8.8 n=57
Body27% 52.9%±10.5 n=31
T23% 45.7%±10.9 n=27

Consistent with an optimal mix (p = 0.24).

Ad court

1st serveUsagePoints won
Wide32% 41.3%±10.1 n=34
Body26% 47.2%±10.8 n=28
T42% 48.6%±9.5 n=45

Consistent with an optimal mix (p = 0.45).

Return by serve direction

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

ServeCourtDirectionPointsWonvs tour
1stAd courtBody 16 46% +2.1±12.1
1stAd courtT 38 29% −6.6±9.0
1stAd courtWide 7 33% −1.1±12.7
1stDeuce courtBody 27 35% −7.9±10.4
1stDeuce courtT 22 22% −9.7±9.5
1stDeuce courtWide 15 29% −4.7±11.2
2ndAd courtBody 30 69% +14.1±9.8
2ndAd courtT 8 59% +4.2±13.1
2ndAd courtWide 8 55% +1.9±13.3
2ndDeuce courtBody 30 64% +9.4±10.2
2ndDeuce courtT 8 52% −3.9±13.3
2ndDeuce courtWide 11 44% −9.5±12.8

Charted matches