Game plan
Zhizhen Zhang v Andreas Seppi
Every number combines what Zhizhen Zhang does well with what Andreas Seppi 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. At least one of them is no longer active or has too little charted in the last three seasons, so both are compared on their careers. The result is then nudged by Zhizhen Zhang's record against Andreas Seppi's tactical lookalikes and in their charted head-to-heads (lookalikes: −7.5 on serve, +2.7 on return vs expectation (254 points); head-to-head: +0.7 on serve, +4.4 on return vs expectation (232 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 | Zhizhen | Andreas |
|---|---|---|
| Direction choice | −0.06 ±0.09 better than 41% | −0.08 ±0.05 better than 36% |
| Shot selection | +0.03 ±0.20 better than 54% | −0.27 ±0.12 better than 26% |
| Execution | −0.36 ±0.66 better than 51% | −0.27 ±0.42 better than 54% |
| Points left on the table | 2.50 ±0.14 lower than 61% | 2.46 ±0.08 lower than 67% |
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.
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.
Zhizhen Zhang serving
Deuce court
| 1st serve | Now | Zhizhen wins | v Andreas | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 43% | 72% | 72% | 71.6%±5.8 | 37% ▼ |
| Body | 7% | 69% | 64% | 69.9%±10.7 | 0% ▼ |
| T | 50% | 76% | 78% | 78.3%±5.1 | 63% ▲ |
Optimal v Andreas Seppi: +0.3±0.7 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +3.5 per 100 first serves in before the returner adjusts.
Ad court
| 1st serve | Now | Zhizhen wins | v Andreas | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 44% | 69% | 79% | 74.9%±5.8 | 38% ▼ |
| Body | 8% | 57% | 65% | 59.5%±12.5 | 0% ▼ |
| T | 49% | 75% | 75% | 78.1%±5.2 | 62% ▲ |
Optimal v Andreas Seppi: +0.9±0.7 per 100 first serves (faults included) over the current mix. Serving T every time would read +2.9 per 100 first serves in before the returner adjusts.
Andreas Seppi serving
Deuce court
| 1st serve | Now | Andreas wins | v Zhizhen | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 48% | 68% | 81% | 77.5%±5.1 | 61% ▲ |
| Body | 4% | 62% | 65% | 64.0%±13.3 | 0% ▼ |
| T | 49% | 72% | 77% | 74.8%±5.9 | 39% ▼ |
Optimal v Zhizhen Zhang: +0.5±0.7 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +1.8 per 100 first serves in before the returner adjusts.
Ad court
| 1st serve | Now | Andreas wins | v Zhizhen | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 49% | 72% | 78% | 77.6%±5.2 | 62% ▲ |
| Body | 6% | 55% | 67% | 58.9%±13.9 | 0% ▼ |
| T | 45% | 67% | 77% | 72.7%±6.3 | 38% ▼ |
Optimal v Zhizhen Zhang: +0.4±0.7 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +3.3 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.
Zhizhen Zhang returning
1st serve to the forehand
| Return | Now | Tour | Own | v Andreas | Value |
|---|---|---|---|---|---|
| FH through the middle | 40% | +4.3 | +0.5 | +1.9 | +6.6±2.5 |
| FH crosscourt | 23% | +5.5 | ±0.0 | +0.8 | +6.4±4.2 |
| FH slice through the middle | 14% | −4.2 | −0.2 | −1.3 | −5.8±2.3 |
| FH down the line | 13% | +1.7 | −5.0 | −1.5 | −4.7±4.3 |
| FH slice crosscourt | 6% | −4.3 | −2.7 | +0.2 | −6.8±2.3 |
Lean FH through the middle: +4.5±1.9 per 100 returns v the current mix (342 returns charted)
1st serve to the backhand
| Return | Now | Tour | Own | v Andreas | Value |
|---|---|---|---|---|---|
| BH through the middle | 37% | +6.4 | +1.7 | −1.2 | +6.9±2.4 |
| BH crosscourt | 27% | +8.8 | +1.6 | +6.1 | +16.5±3.4 |
| BH slice through the middle | 12% | −4.2 | −1.2 | +0.2 | −5.2±2.4 |
| BH slice crosscourt | 11% | +0.5 | +0.9 | +1.3 | +2.8±3.0 |
| BH down the line | 9% | +4.2 | +0.2 | +1.9 | +6.3±4.6 |
Lean BH crosscourt: +9.7±2.7 per 100 returns v the current mix (368 returns charted)
2nd serve to the forehand
| Return | Now | Tour | Own | v Andreas | Value |
|---|---|---|---|---|---|
| FH through the middle | 45% | −3.5 | −2.6 | −1.0 | −7.1±2.8 |
| FH crosscourt | 35% | −0.2 | +0.8 | +1.3 | +1.9±4.3 |
| FH down the line | 20% | −1.8 | −0.8 | +3.1 | +0.6±4.5 |
Lean FH crosscourt: +4.3±3.2 per 100 returns v the current mix (100 returns charted)
2nd serve to the backhand
| Return | Now | Tour | Own | v Andreas | Value |
|---|---|---|---|---|---|
| BH through the middle | 54% | −2.9 | +2.0 | +1.2 | +0.4±2.1 |
| BH crosscourt | 38% | +1.0 | +1.3 | +1.4 | +3.8±2.9 |
| BH down the line | 7% | −0.2 | −1.2 | +2.9 | +1.5±4.7 |
Lean BH crosscourt: +2.0±2.2 per 100 returns v the current mix (268 returns charted, inside the 90% margin)
Andreas Seppi returning
1st serve to the forehand
| Return | Now | Tour | Own | v Zhizhen | Value |
|---|---|---|---|---|---|
| FH through the middle | 50% | +4.3 | +0.8 | −0.6 | +4.5±2.4 |
| FH down the line | 21% | +1.7 | −0.7 | +0.6 | +1.6±4.4 |
| FH crosscourt | 19% | +5.5 | −0.1 | −0.8 | +4.6±4.3 |
| FH slice through the middle | 5% | −4.2 | −0.8 | −1.6 | −6.6±2.3 |
| FH slice down the line | 2% | −4.3 | −3.1 | −0.4 | −7.7±2.4 |
Lean FH crosscourt: +1.8±3.8 per 100 returns v the current mix (470 returns charted, inside the 90% margin)
1st serve to the backhand
| Return | Now | Tour | Own | v Zhizhen | Value |
|---|---|---|---|---|---|
| BH through the middle | 34% | +6.4 | ±0.0 | −0.4 | +6.1±2.4 |
| BH slice through the middle | 25% | −4.2 | −2.3 | −0.9 | −7.4±2.4 |
| BH crosscourt | 18% | +8.8 | +1.4 | +0.7 | +10.9±3.5 |
| BH slice crosscourt | 8% | +0.5 | −1.5 | −2.3 | −3.3±3.0 |
| BH slice down the line | 8% | −8.4 | −1.8 | ±0.0 | −10.2±3.2 |
Lean BH crosscourt: +9.4±3.1 per 100 returns v the current mix (479 returns charted)
2nd serve to the forehand
| Return | Now | Tour | Own | v Zhizhen | Value |
|---|---|---|---|---|---|
| FH through the middle | 50% | −3.5 | +1.4 | −1.1 | −3.2±2.8 |
| FH down the line | 28% | −1.8 | −0.1 | −1.4 | −3.3±4.7 |
| FH crosscourt | 22% | −0.2 | −1.0 | +2.3 | +1.0±4.3 |
Lean FH crosscourt: +3.3±3.9 per 100 returns v the current mix (127 returns charted, inside the 90% margin)
2nd serve to the backhand
| Return | Now | Tour | Own | v Zhizhen | Value |
|---|---|---|---|---|---|
| BH through the middle | 43% | −2.9 | −0.3 | −0.7 | −3.8±2.2 |
| BH crosscourt | 37% | +1.0 | +2.2 | −0.5 | +2.7±2.9 |
| BH down the line | 13% | −0.2 | +2.4 | +1.6 | +3.9±5.0 |
| BH slice through the middle | 2% | −11.3 | −2.1 | ±0.0 | −13.4±1.1 |
| FH inside-in | 2% | +0.6 | −0.5 | +2.3 | +2.3±3.6 |
Lean BH down the line: +4.4±4.6 per 100 returns v the current mix (338 returns charted, inside the 90% margin)
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 grass. Each player's grass record is shrunk toward their all-surface one, so a thin sample on it moves the numbers only a little.
Zhizhen Zhang
Favour
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| BH to their backhand · return | +5.2±4.7 | −0.1 | +5.4 |
| BH to their backhand · serve +1 | +3.7±4.3 | −0.2 | +4.0 |
| BH to the middle · return | +2.5±3.4 | +3.0 | −0.4 |
| FH to their backhand · return +1 | +1.8±4.7 | −1.1 | +3.0 |
| FH to the middle · return | +1.5±3.7 | −1.1 | +2.5 |
| FH to their forehand · return | +1.1±5.9 | −0.5 | +1.6 |
Avoid
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| FH to the middle · serve +1 | −4.1±3.5 | −1.7 | −2.3 |
| FH to their backhand · return | −4.0±4.8 | −5.7 | +1.7 |
| BH to their backhand · return +1 | −3.6±4.3 | −2.9 | −0.7 |
| BH to their forehand · rally | −3.1±4.5 | −1.7 | −1.3 |
| FH to their backhand · rally | −2.5±4.6 | −0.8 | −1.7 |
Andreas Seppi
Favour
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| BH to their forehand · serve +1 | +5.0±4.7 | +1.7 | +3.4 |
| FH to their forehand · return +1 | +4.3±5.6 | +3.3 | +1.0 |
| FH to their forehand · rally | +3.6±4.7 | −1.0 | +4.6 |
| BH to the middle · return +1 | +3.5±3.0 | +2.0 | +1.6 |
| BH to their backhand · return +1 | +3.3±4.9 | +2.6 | +0.7 |
| BH to their backhand · serve +1 | +2.8±3.8 | +2.1 | +0.7 |
Avoid
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| FH to their forehand · return | −2.7±6.1 | ±0.0 | −2.7 |
| BH slice to the middle · return | −2.5±2.9 | −2.3 | −0.2 |
| BH to the middle · serve +1 | −2.3±3.1 | −2.1 | −0.2 |
| FH to the middle · rally | −2.3±3.2 | −0.1 | −2.3 |
| BH to their forehand · rally | −2.0±4.9 | −0.1 | −1.9 |
Against Andreas Seppi-like opponents
| Zhizhen Zhang v | Matches | Serve pts won | Return pts won |
|---|---|---|---|
| All charted opponents | – | 63.8% | 30.7% |
| Players most similar to Andreas Seppi | 1 | 54.5% | 39.2% |
| Andreas Seppi (charted head-to-head) | 1 | 63.2% | 39.0% |
Similar by tactical fingerprint: Gael Monfils, Marcos Giron, Taylor Fritz, Rinky Hijikata, Alexandre Muller, Arthur Cazaux, Borna Coric, Andy Murray, Karim Mohamed Maamoun, Marcos Baghdatis. When two players have rarely met, their records against these lookalikes fill the gap.