RallyIQ

ATP · Left-handed · 3 charted matches · 2019–2021

Alex Bolt

Shot expected value

The share of points Alex Bolt 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 44% to the average player · 43 shots

OptionUsedWin %Tour
FH crosscourt 56% 53.0%±12.4 46.6%
FH through the middle 28% 35.3%±13.9 41.5%

Serve under pressure

Deuce court

1st serveUsageBreak ptWon when in
Wide 43% 50% 82% / 73%
Body 3% 0% 67% / 63%
T 54% 50% 70% / 75%

134 normal · 8 break-point 1st serves

Ad court

1st serveUsageBreak ptWon when in
Wide 54% 45% ▼ 73% / 73%
Body 3% 5% 57% / 63%
T 43% 50% 75% / 72%

107 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. No measurable response (−0.05 ± 0.15 points per 100 serves for every 10 points of habitual usage), measured from ATP 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
Wide44% 63.5%±8.3 n=62
Body3% 69.3%±13.0 n=4
T54% 64.5%±7.6 n=76

Consistent with an optimal mix (p = 0.67).

Ad court

1st serveUsagePoints won
Wide53% 59.6%±8.2 n=68
Body3% 50.1%±14.1 n=4
T44% 57.6%±8.7 n=57

Consistent with an optimal mix (p = 0.43).

Repeating the previous direction to the same court: −2.1±8.4 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. (119 repeats, 146 switches.)

Return by serve direction

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

ServeCourtDirectionPointsWonvs tour
1stAd courtBody 13 33% −4.2±11.8
1stAd courtT 28 32% +3.7±10.1
1stAd courtWide 22 25% −1.9±9.9
1stDeuce courtBody 13 30% −6.4±11.5
1stDeuce courtT 27 27% +2.2±9.7
1stDeuce courtWide 43 18% −9.2±7.4
2ndAd courtBody 14 50% +0.2±12.4
2ndAd courtT 22 52% +2.2±11.4
2ndAd courtWide 11 45% −3.2±12.8
2ndDeuce courtBody 23 43% −6.2±11.2
2ndDeuce courtT 9 46% −3.8±13.1
2ndDeuce courtWide 8 43% −4.9±13.2

Charted matches