Game plan
Katie Volynets v Veronika Erjavec
Every number combines what Katie Volynets does well with what Veronika Erjavec allows, each measured against the tour average and shrunk toward it when the sample is thin. Flip perspective
Serve plan
The share of points the server wins when a first serve lands in that direction (hover a rate for its 90% interval; ± is the 90% margin). "Matchup" combines the server's rate with how this returner handles that serve. "Optimal" is the mix that wins most against this returner once they start reading a habit, at the response measured across the tour, and only within the range servers' habits actually vary. The gain over the current mix is how exploitable that mix is.
Katie Volynets serving
Deuce court
| 1st serve | Now | Katie wins | v Veronika | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 47% | 64% | 74% | 72.4%±10.5 | 62% ▲ |
| Body | 29% | 52% | 54% | 48.1%±13.5 | 13% ▼ |
| T | 24% | 58% | 70% | 61.1%±12.5 | 25% |
Optimal v Veronika Erjavec: +1.5±1.2 per 100 first serves (faults included) over the current mix. Serving wide every time would read +9.7 per 100 first serves in before the returner adjusts.
Ad court
| 1st serve | Now | Katie wins | v Veronika | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 28% | 68% | 70% | 72.5%±10.7 | 43% ▲ |
| Body | 22% | 54% | 51% | 48.6%±15.0 | 7% ▼ |
| T | 50% | 59% | 71% | 65.8%±11.9 | 50% |
Optimal v Veronika Erjavec: +0.9±1.3 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +8.7 per 100 first serves in before the returner adjusts.
Veronika Erjavec serving
Deuce court
| 1st serve | Now | Veronika wins | v Katie | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 44% | 65% | 66% | 64.7%±11.5 | 59% ▲ |
| Body | 14% | 58% | 57% | 58.0%±14.5 | 0% ▼ |
| T | 42% | 60% | 63% | 54.6%±12.8 | 41% ▼ |
Optimal v Katie Volynets: +0.3±1.1 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +5.1 per 100 first serves in before the returner adjusts.
Ad court
| 1st serve | Now | Veronika wins | v Katie | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 42% | 71% | 62% | 67.0%±12.1 | 51% ▲ |
| Body | 18% | 53% | 52% | 48.4%±14.4 | 3% ▼ |
| T | 40% | 67% | 64% | 66.5%±11.9 | 46% ▲ |
Optimal v Katie Volynets: +0.7±1.1 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +3.5 per 100 first serves in before the returner adjusts.
Return plan
Value of each return, in points per 100 returns against an average return of the same serve (direction, court, surface): the tour's result with that return, the returner's own edge with it, and what this server gives up when it comes back to that side. Returns with no charted direction are left out, so values compare with each other rather than with zero. Depth isn't a choice here: missed returns have no depth. Serve quality isn't charted, so a block through the middle partly reflects the serve that forced it.
Katie Volynets returning
1st serve to the forehand
| Return | Now | Tour | Own | v Veronika | Value |
|---|---|---|---|---|---|
| FH through the middle | 49% | +4.2 | +1.6 | +2.4 | +8.2±2.8 |
| FH crosscourt | 32% | +5.3 | +1.3 | ±0.0 | +6.6±3.7 |
| FH down the line | 11% | +1.5 | −2.2 | +0.3 | −0.4±4.1 |
| FH slice through the middle | 5% | −6.7 | −0.3 | −1.5 | −8.5±1.9 |
| FH slice crosscourt | 2% | −6.6 | ±0.0 | ±0.0 | −6.6±1.4 |
Lean FH through the middle: +2.9±1.9 per 100 returns v the current mix (372 returns charted)
1st serve to the backhand
| Return | Now | Tour | Own | v Veronika | Value |
|---|---|---|---|---|---|
| BH through the middle | 49% | +6.0 | +1.5 | +1.6 | +9.1±2.7 |
| BH crosscourt | 25% | +7.7 | +4.0 | −0.9 | +10.8±3.5 |
| BH down the line | 12% | +2.2 | +1.4 | ±0.0 | +3.5±3.3 |
| BH slice through the middle | 8% | −6.2 | ±0.0 | ±0.0 | −6.2±1.7 |
| BH slice crosscourt | 3% | −4.2 | +0.5 | ±0.0 | −3.7±1.6 |
Lean BH crosscourt: +4.1±3.0 per 100 returns v the current mix (294 returns charted)
2nd serve to the forehand
| Return | Now | Tour | Own | v Veronika | Value |
|---|---|---|---|---|---|
| FH through the middle | 54% | −3.2 | +2.6 | −0.7 | −1.2±2.8 |
| FH crosscourt | 35% | +0.5 | +1.2 | +1.2 | +3.0±3.7 |
| FH down the line | 11% | −0.6 | −2.5 | +0.3 | −2.8±3.4 |
Lean FH crosscourt: +2.9±2.9 per 100 returns v the current mix (83 returns charted)
2nd serve to the backhand
| Return | Now | Tour | Own | v Veronika | Value |
|---|---|---|---|---|---|
| BH through the middle | 48% | −2.6 | +1.4 | −1.0 | −2.2±2.8 |
| BH crosscourt | 32% | +1.5 | +3.5 | +0.4 | +5.3±3.6 |
| BH down the line | 20% | −0.5 | −0.3 | +0.1 | −0.8±4.4 |
Lean BH crosscourt: +4.8±2.9 per 100 returns v the current mix (125 returns charted)
Veronika Erjavec returning
1st serve to the forehand
| Return | Now | Tour | Own | v Katie | Value |
|---|---|---|---|---|---|
| FH crosscourt | 36% | +5.3 | −2.8 | +3.9 | +6.5±3.6 |
| FH down the line | 33% | +1.5 | −0.2 | +1.9 | +3.2±4.1 |
| FH through the middle | 31% | +4.2 | −2.5 | +1.9 | +3.6±2.4 |
Lean FH crosscourt: +2.0±2.8 per 100 returns v the current mix (42 returns charted, inside the 90% margin)
1st serve to the backhand
| Return | Now | Tour | Own | v Katie | Value |
|---|---|---|---|---|---|
| BH through the middle | 34% | +6.0 | +0.2 | +1.6 | +7.8±2.4 |
| BH crosscourt | 19% | +7.7 | +0.4 | +2.6 | +10.7±3.0 |
| BH down the line | 19% | +2.2 | +1.2 | +1.3 | +4.6±4.1 |
| BH slice crosscourt | 17% | −4.2 | +0.1 | −0.7 | −4.8±2.3 |
| BH slice through the middle | 11% | −6.2 | −0.3 | +0.7 | −5.9±1.8 |
Lean BH through the middle: +3.7±1.9 per 100 returns v the current mix (47 returns charted)
Rally plan
Edge, in points per 100 shots: the hitter's skill with the shot (own) plus how much the receiver usually gives up against it (theirs), both measured against the tour average on hard. Each player's hard record is shrunk toward their all-surface one, so a thin sample on it moves the numbers only a little.
Katie Volynets
Favour
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| BH to their backhand · rally | +6.5±4.0 | +3.2 | +3.3 |
| FH to their forehand · rally | +5.6±4.1 | +3.1 | +2.5 |
| BH to the middle · rally | +4.0±2.7 | +2.9 | +1.0 |
| BH to their forehand · rally | +2.9±5.5 | +0.9 | +2.0 |
| BH to the middle · return | +2.7±3.5 | +1.7 | +1.0 |
| FH to their backhand · rally | +1.9±5.0 | +1.0 | +1.0 |
Avoid
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| FH to their backhand · rally | +1.9±5.0 | +1.0 | +1.0 |
| BH to the middle · return | +2.7±3.5 | +1.7 | +1.0 |
| BH to their forehand · rally | +2.9±5.5 | +0.9 | +2.0 |
| BH to the middle · rally | +4.0±2.7 | +2.9 | +1.0 |
| FH to their forehand · rally | +5.6±4.1 | +3.1 | +2.5 |
Veronika Erjavec
Favour
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| BH to the middle · rally | +4.5±3.0 | +2.5 | +2.0 |
| FH to their forehand · rally | +2.5±4.3 | +2.9 | −0.4 |
| BH to their backhand · rally | +1.0±4.0 | +0.7 | +0.3 |
| BH to their forehand · rally | −1.5±6.0 | −1.0 | −0.5 |
| FH to their backhand · rally | −3.4±4.5 | −2.3 | −1.1 |
Avoid
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| FH to their backhand · rally | −3.4±4.5 | −2.3 | −1.1 |
| BH to their forehand · rally | −1.5±6.0 | −1.0 | −0.5 |
| BH to their backhand · rally | +1.0±4.0 | +0.7 | +0.3 |
| FH to their forehand · rally | +2.5±4.3 | +2.9 | −0.4 |
| BH to the middle · rally | +4.5±3.0 | +2.5 | +2.0 |
Against Veronika Erjavec-like opponents
| Katie Volynets v | Matches | Serve pts won | Return pts won |
|---|---|---|---|
| All charted opponents | – | 55.8% | 44.0% |