WTA · Right-handed · 3 charted matches · 2009–2015
Petra Cetkovska
Shot expected value
The share of points Petra Cetkovska 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 · 127 shots
| Option | Used | Win % | Tour |
|---|---|---|---|
| BH crosscourt | 27% | 51.0%±11.2 | 47.6% |
| BH through the middle | 23% | 50.3%±11.7 | 43.3% |
| BH down the line | 18% | 45.0%±12.5 | 46.8% |
| BH slice crosscourt | 18% | 44.4%±12.5 | 40.4% |
| BH slice through the middle | 9% | 31.9%±13.8 | 34.4% |
Rally, shots 5–8: drive to your forehand side
position worth 43% to the average player · 77 shots
| Option | Used | Win % | Tour |
|---|---|---|---|
| FH crosscourt | 38% | 47.7%±11.7 | 46.7% |
| FH through the middle | 30% | 47.1%±12.5 | 41.3% |
| FH down the line | 25% | 48.7%±13.2 | 44.9% |
Rally, shots 5–8: drive to your middle
position worth 50% to the average player · 77 shots
| Option | Used | Win % | Tour |
|---|---|---|---|
| FH crosscourt | 39% | 63.1%±11.2 | 52.7% |
| FH down the line | 16% | 51.4%±14.5 | 52.2% |
| BH down the line | 13% | 50.0%±15.0 | 50.0% |
Long rally, 9+: drive to your backhand side
position worth 44% to the average player · 72 shots
| Option | Used | Win % | Tour |
|---|---|---|---|
| BH crosscourt | 28% | 51.5%±13.0 | 47.9% |
| BH through the middle | 18% | 35.0%±13.7 | 42.7% |
| BH slice crosscourt | 17% | 49.2%±14.5 | 38.7% |
| BH down the line | 15% | 43.1%±14.6 | 46.7% |
| BH slice through the middle | 14% | 39.0%±14.6 | 33.4% |
Serve under pressure
Deuce court
| 1st serve | Usage | Break pt | Won when in |
|---|---|---|---|
| Wide | 42% | 33% ▼ | 60% / 66% |
| Body | 33% | 33% | 55% / 57% |
| T | 25% | 33% | 69% / 68% |
110 normal · 9 break-point 1st serves
Ad court
| 1st serve | Usage | Break pt | Won when in |
|---|---|---|---|
| Wide | 31% | 22% ▼ | 55% / 66% |
| Body | 23% | 19% | 53% / 56% |
| T | 45% | 59% ▲ | 59% / 64% |
86 normal · 27 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 serve | Usage | Points won |
|---|---|---|
| Wide | 41% | 52.8%±9.2 n=49 |
| Body | 33% | 56.5%±9.8 n=39 |
| T | 26% | 54.9%±10.5 n=31 |
Consistent with an optimal mix (p = 0.83).
Ad court
| 1st serve | Usage | Points won |
|---|---|---|
| Wide | 29% | 47.5%±10.3 n=33 |
| Body | 22% | 47.5%±11.1 n=25 |
| T | 49% | 50.3%±8.9 n=55 |
Consistent with an optimal mix (p = 0.86).
Return by serve direction
Return points won against each serve direction, compared with the tour average.
| Serve | Court | Direction | Points | Won | vs tour | |
|---|---|---|---|---|---|---|
| 1st | Ad court | Body | 14 | 41% | −2.6±12.2 | |
| 1st | Ad court | T | 35 | 38% | +2.4±9.9 | |
| 1st | Ad court | Wide | 29 | 29% | −5.1±9.8 | |
| 1st | Deuce court | Body | 15 | 48% | +5.8±12.3 | |
| 1st | Deuce court | T | 29 | 37% | +4.5±10.3 | |
| 1st | Deuce court | Wide | 35 | 33% | −1.4±9.6 | |
| 2nd | Ad court | Body | 21 | 50% | −5.0±11.5 | |
| 2nd | Ad court | T | 2 | 52% | −3.4±14.5 | |
| 2nd | Ad court | Wide | 20 | 56% | +2.6±11.5 | |
| 2nd | Deuce court | Body | 35 | 57% | +3.0±10.1 | |
| 2nd | Deuce court | T | 10 | 57% | +1.0±12.9 | |
| 2nd | Deuce court | Wide | 5 | 58% | +3.7±13.7 |
Signature patterns
Recurring sequences that win more than Petra Cetkovska's own baseline, ranked by edge weighted by how often they're used.
Serve → +1
- Not enough data
Return
- Not enough data
Rally, consecutive own shots
- FH crosscourt → FH down the line used 27.6% · won 60% · −1.9±11.3 vs own baseline
- FH crosscourt → FH crosscourt used 26.3% · won 57% · −4.7±11.6 vs own baseline