Game plan
Katie Boulter v Eva Lys
Every number combines what Katie Boulter does well with what Eva Lys allows, each measured against the tour average and shrunk toward it when the sample is thin. Flip perspective
Forecast
Each player's serve and return strength is fitted against every opponent they were charted against, so a record built on weak opponents counts for less. Both were charted enough in the last three seasons, so those carry the most weight. The result is then nudged by Katie Boulter's record against Eva Lys's tactical lookalikes and in their charted head-to-heads (lookalikes: +2.2 on serve, −2.7 on return vs expectation (571 points); head-to-head: −12.5 on serve, −7.0 on return vs expectation (110 points)). A game-by-game Markov chain turns point odds into match odds; the 90% range covers the uncertainty in the two strengths, not the nudges. Charted matches lean toward big events, so treat this as a scouting estimate, not a betting line.
Head to head, per 100 shots
| Career | Katie | Eva |
|---|---|---|
| Direction choice | −0.15 ±0.07 better than 26% | −0.04 ±0.11 better than 46% |
| Shot selection | +0.24 ±0.18 better than 72% | +0.39 ±0.12 better than 88% |
| Execution | −0.88 ±0.63 better than 21% | −0.76 ±0.64 better than 25% |
| Points left on the table | 2.79 ±0.11 lower than 25% | 2.43 ±0.15 lower than 71% |
Each player's career against an average tour player in the same position, adjusted for opponent strength, with a 90% margin (shots clustered by match). Points left on the table is the gap to the best-value direction for the same stroke, so lower is better. Percentiles are within each player's own tour. A side is highlighted only when the gap is larger than the margin on the difference.
Structural compatibility
Expected edge per 100 rally shots from style alone: Katie Boulter +0.09, Eva Lys −0.54. Each player's shot mix weighted by their own skill with each shot and by how much the other gives up against it. This is why some rankings gaps don't hold in a given matchup.
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 Boulter serving
Deuce court
| 1st serve | Now | Katie wins | v Eva | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 39% | 68% | 66% | 68.6%±7.6 | 39% |
| Body | 21% | 55% | 53% | 50.6%±10.7 | 6% ▼ |
| T | 40% | 71% | 70% | 73.3%±7.4 | 55% ▲ |
Optimal v Eva Lys: +1.0±1.1 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +6.6 per 100 first serves in before the returner adjusts.
Ad court
| 1st serve | Now | Katie wins | v Eva | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 53% | 68% | 61% | 64.1%±8.1 | 38% ▼ |
| Body | 17% | 62% | 57% | 62.6%±11.2 | 16% |
| T | 31% | 66% | 64% | 65.2%±8.9 | 46% ▲ |
Optimal v Eva Lys: +0.5±1.1 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +1.0 per 100 first serves in before the returner adjusts.
Eva Lys serving
Deuce court
| 1st serve | Now | Eva wins | v Katie | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 43% | 57% | 64% | 54.5%±8.0 | 52% ▲ |
| Body | 27% | 53% | 66% | 61.3%±9.5 | 33% ▲ |
| T | 30% | 54% | 71% | 57.4%±9.2 | 15% ▼ |
Optimal v Katie Boulter: +0.1±0.9 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving body every time would read +4.1 per 100 first serves in before the returner adjusts.
Ad court
| 1st serve | Now | Eva wins | v Katie | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 30% | 67% | 70% | 71.3%±7.8 | 45% ▲ |
| Body | 21% | 49% | 61% | 53.1%±11.1 | 5% ▼ |
| T | 50% | 55% | 67% | 57.4%±8.4 | 50% |
Optimal v Katie Boulter: +1.4±1.2 per 100 first serves (faults included) over the current mix. Serving wide every time would read +10.7 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 Boulter returning
1st serve to the forehand
| Return | Now | Tour | Own | v Eva | Value |
|---|---|---|---|---|---|
| FH through the middle | 28% | +4.2 | +1.8 | +2.5 | +8.4±2.8 |
| FH slice through the middle | 27% | −6.7 | −2.2 | +0.7 | −8.2±2.4 |
| FH crosscourt | 19% | +5.3 | −0.3 | +5.5 | +10.5±4.3 |
| FH down the line | 14% | +1.5 | +2.9 | +0.8 | +5.2±4.7 |
| FH slice crosscourt | 9% | −6.6 | +1.6 | ±0.0 | −5.1±2.2 |
Lean FH crosscourt: +8.4±3.7 per 100 returns v the current mix (285 returns charted)
1st serve to the backhand
| Return | Now | Tour | Own | v Eva | Value |
|---|---|---|---|---|---|
| BH through the middle | 45% | +6.0 | −2.9 | +1.4 | +4.5±2.5 |
| BH down the line | 26% | +2.2 | −1.8 | +4.8 | +5.2±4.7 |
| BH crosscourt | 16% | +7.7 | +0.5 | +2.6 | +10.8±3.6 |
| BH slice crosscourt | 5% | −4.2 | −1.3 | +0.2 | −5.2±2.2 |
| BH slice down the line | 4% | −12.5 | −0.7 | ±0.0 | −13.2±2.0 |
Lean BH crosscourt: +6.7±3.4 per 100 returns v the current mix (269 returns charted)
2nd serve to the forehand
| Return | Now | Tour | Own | v Eva | Value |
|---|---|---|---|---|---|
| FH through the middle | 37% | −3.2 | −3.1 | −0.3 | −6.6±3.0 |
| FH crosscourt | 31% | +0.5 | +2.3 | +0.9 | +3.7±4.4 |
| FH down the line | 23% | −0.6 | −1.4 | +2.9 | +1.0±5.1 |
| FH slice through the middle | 9% | −15.2 | −0.2 | +1.0 | −14.5±1.7 |
Lean FH crosscourt: +6.1±3.5 per 100 returns v the current mix (98 returns charted)
2nd serve to the backhand
| Return | Now | Tour | Own | v Eva | Value |
|---|---|---|---|---|---|
| BH through the middle | 43% | −2.6 | −0.9 | −0.1 | −3.6±2.8 |
| BH crosscourt | 18% | +1.5 | −0.6 | +0.9 | +1.9±3.6 |
| FH through the middle | 15% | −2.7 | −0.6 | −0.3 | −3.6±2.5 |
| BH down the line | 13% | −0.5 | −2.3 | +1.4 | −1.5±4.7 |
| FH inside-in | 7% | +0.7 | +0.1 | +0.9 | +1.7±4.3 |
Lean BH crosscourt: +3.6±3.3 per 100 returns v the current mix (168 returns charted)
Eva Lys returning
1st serve to the forehand
| Return | Now | Tour | Own | v Katie | Value |
|---|---|---|---|---|---|
| FH through the middle | 57% | +4.2 | −0.7 | −0.5 | +2.9±2.8 |
| FH crosscourt | 25% | +5.3 | −3.3 | +2.3 | +4.4±4.4 |
| FH down the line | 18% | +1.5 | −7.2 | +0.2 | −5.5±4.7 |
Lean FH crosscourt: +2.6±3.8 per 100 returns v the current mix (261 returns charted, inside the 90% margin)
1st serve to the backhand
| Return | Now | Tour | Own | v Katie | Value |
|---|---|---|---|---|---|
| BH through the middle | 54% | +6.0 | −0.8 | −2.2 | +3.1±2.6 |
| BH crosscourt | 28% | +7.7 | −0.7 | +0.4 | +7.4±3.6 |
| BH down the line | 13% | +2.2 | +1.9 | −0.5 | +3.6±4.6 |
| BH slice crosscourt | 3% | −4.2 | −2.5 | −0.9 | −7.5±2.5 |
| BH slice through the middle | 2% | −6.2 | −0.5 | ±0.0 | −6.7±2.1 |
Lean BH crosscourt: +3.6±3.0 per 100 returns v the current mix (255 returns charted)
2nd serve to the forehand
| Return | Now | Tour | Own | v Katie | Value |
|---|---|---|---|---|---|
| FH through the middle | 45% | −3.2 | −2.2 | −1.7 | −7.0±2.9 |
| FH crosscourt | 38% | +0.5 | −1.3 | +0.7 | −0.1±4.3 |
| FH down the line | 16% | −0.6 | +0.3 | −2.0 | −2.2±4.7 |
Lean FH crosscourt: +3.5±3.1 per 100 returns v the current mix (73 returns charted)
2nd serve to the backhand
| Return | Now | Tour | Own | v Katie | Value |
|---|---|---|---|---|---|
| BH crosscourt | 53% | +1.5 | −0.7 | +1.5 | +2.4±3.6 |
| BH through the middle | 32% | −2.6 | ±0.0 | +0.3 | −2.3±2.8 |
| BH down the line | 15% | −0.5 | −1.7 | −0.9 | −3.2±5.0 |
Lean BH crosscourt: +2.3±2.0 per 100 returns v the current mix (143 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.
Katie Boulter
Favour
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| FH to their forehand · return | +7.6±4.0 | +3.3 | +4.2 |
| FH to their backhand · serve +1 | +5.6±3.8 | +3.7 | +1.9 |
| BH to their backhand · return | +3.7±3.4 | +0.5 | +3.3 |
| FH to their backhand · return +1 | +3.4±3.9 | +2.6 | +0.8 |
| FH to their forehand · return +1 | +3.3±3.7 | +2.8 | +0.5 |
| FH to the middle · serve +1 | +1.8±2.6 | +0.4 | +1.5 |
Avoid
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| BH to their forehand · serve +1 | −8.4±4.9 | −4.3 | −4.1 |
| BH to their forehand · rally | −7.1±4.2 | −5.8 | −1.4 |
| FH to their forehand · serve +1 | −3.5±3.9 | −1.5 | −2.0 |
| BH to the middle · return +1 | −2.1±2.5 | −1.7 | −0.4 |
| FH to the middle · rally | −1.5±2.2 | −1.5 | −0.1 |
Eva Lys
Favour
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| BH to their forehand · return +1 | +1.9±4.8 | −1.3 | +3.3 |
| BH to their forehand · serve +1 | +1.9±4.8 | −2.0 | +3.9 |
| BH to their backhand · return | +1.7±3.2 | ±0.0 | +1.7 |
| BH to the middle · serve +1 | +1.5±2.4 | +0.9 | +0.6 |
| BH to the middle · rally | +1.3±1.9 | +1.6 | −0.3 |
| BH to the middle · return +1 | +0.5±2.5 | −0.6 | +1.1 |
Avoid
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| FH to their backhand · return | −9.3±4.3 | −7.7 | −1.6 |
| FH to their backhand · serve +1 | −5.3±3.8 | −2.3 | −3.0 |
| BH to their forehand · return | −3.3±4.6 | −2.6 | −0.7 |
| FH to the middle · return | −3.0±2.4 | −0.5 | −2.6 |
| FH to their backhand · return +1 | −2.7±4.3 | −4.8 | +2.1 |
Against Eva Lys-like opponents
| Katie Boulter v | Matches | Serve pts won | Return pts won |
|---|---|---|---|
| All charted opponents | – | 56.4% | 41.3% |
| Players most similar to Eva Lys | 3 | 56.4% | 36.7% |
| Eva Lys (charted head-to-head) | 1 | 43.9% | 40.6% |
Similar by tactical fingerprint: Iva Jovic, Karolina Pliskova, Iga Swiatek, Belinda Bencic, Ekaterina Alexandrova, Kimberly Birrell, Shuai Zhang, Lin Zhu, Tsvetana Pironkova, Maria Sharapova. When two players have rarely met, their records against these lookalikes fill the gap.