RallyIQ

ATP · Right-handed · 5 charted matches · 1988–1996

Jakob Hlasek

Against an average opponent

Serve points won 61.9% ±3.9 raw 56.5% · tour 63.4% · 347 points
Return points won 33.7% ±3.8 raw 30.3% · tour 36.6% · 330 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.

Shot expected value

The share of points Jakob Hlasek 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 · 53 shots

OptionUsedWin %Tour
FH crosscourt 47% 36.3%±11.8 46.6%
FH through the middle 26% 36.2%±13.6 41.5%
FH down the line 26% 35.1%±13.5 44.7%

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

position worth 46% to the average player · 53 shots

OptionUsedWin %Tour
BH slice crosscourt 26% 42.6%±14.0 42.5%
BH crosscourt 21% 37.2%±14.3 47.6%
BH through the middle 19% 35.8%±14.4 43.7%

Return +1: drive to your backhand side

position worth 44% to the average player · 39 shots

OptionUsedWin %Tour
BH crosscourt 33% 37.5%±13.9 46.9%
BH through the middle 31% 36.3%±14.0 43.0%

Serve under pressure

Pressure predictability index +3 How much less varied Jakob Hlasek's first-serve direction gets on break points. Positive means easier to read. Based on 41 break-point first serves.

Deuce court

1st serveUsageBreak ptWon when in
Wide 43% 44% 68% / 73%
Body 8% 11% 59% / 63%
T 49% 44% 72% / 75%

167 normal · 9 break-point 1st serves

Ad court

1st serveUsageBreak ptWon when in
Wide 50% 50% 67% / 73%
Body 20% 13% 63% / 63%
T 30% 38% 74% / 72%

125 normal · 32 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
Wide43% 53.6%±8.0 n=76
Body9% 55.4%±12.2 n=15
T48% 60.3%±7.5 n=85

Consistent with an optimal mix (p = 0.42).

Ad court

1st serveUsagePoints won
Wide50% 52.8%±7.9 n=78
Body18% 59.9%±10.5 n=29
T32% 61.5%±8.9 n=50

Consistent with an optimal mix (p = 0.29).

Repeating the previous direction to the same court: −7.4±9.0 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. (113 repeats, 212 switches.)

Return by serve direction

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

ServeCourtDirectionPointsWonvs tour
1stAd courtBody 9 34% −3.4±12.4
1stAd courtT 16 25% −3.2±10.5
1stAd courtWide 53 19% −7.8±7.2
1stDeuce courtBody 22 35% −2.1±10.9
1stDeuce courtT 48 24% −1.3±7.9
1stDeuce courtWide 33 29% +1.6±9.4
2ndAd courtBody 21 45% −4.6±11.5
2ndAd courtT 3 51% +1.6±14.3
2ndAd courtWide 47 42% −6.1±9.3
2ndDeuce courtBody 18 41% −8.0±11.7
2ndDeuce courtT 37 51% +0.9±10.0
2ndDeuce courtWide 11 40% −8.0±12.6

Charted matches