Game plan
Hyeon Chung v Gilles Simon
Every number combines what Hyeon Chung does well with what Gilles Simon 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 At least one of them is no longer active or has too little charted in the last three seasons, so both are compared on their careers.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 Hyeon Chung's record against Gilles Simon's tactical lookalikes and in their charted head-to-heads (lookalikes: −3.9 on serve, −2.6 on return vs expectation (148 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 | Hyeon | Gilles |
|---|---|---|
| Direction choice | −0.27 ±0.10 better than 7% | −0.03 ±0.06 better than 49% |
| Shot selection | −0.08 ±0.26 better than 42% | −0.07 ±0.08 better than 44% |
| Execution | −0.07 ±1.07 better than 65% | +1.17 ±0.30 better than 97% |
| Points left on the table | 2.47 ±0.15 lower than 66% | 2.26 ±0.09 lower than 88% |
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.
Hyeon Chung serving
Deuce court
| 1st serve | Now | Hyeon wins | v Gilles | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 44% | 65% | 72% | 64.2%±6.8 | 57% ▲ |
| Body | 15% | 59% | 55% | 50.7%±11.2 | 2% ▼ |
| T | 41% | 69% | 76% | 69.6%±7.5 | 41% |
Optimal v Gilles Simon: +0.8±0.9 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +5.2 per 100 first serves in before the returner adjusts.
Ad court
| 1st serve | Now | Hyeon wins | v Gilles | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 37% | 61% | 70% | 57.4%±8.9 | 37% |
| Body | 20% | 60% | 62% | 58.5%±11.6 | 7% ▼ |
| T | 43% | 65% | 69% | 61.9%±8.0 | 56% ▲ |
Optimal v Gilles Simon: +0.6±0.9 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +2.4 per 100 first serves in before the returner adjusts.
Gilles Simon serving
Deuce court
| 1st serve | Now | Gilles wins | v Hyeon | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 53% | 66% | 72% | 64.8%±7.1 | 46% ▼ |
| Body | 7% | 57% | 49% | 42.5%±11.7 | 0% ▼ |
| T | 41% | 72% | 78% | 75.5%±7.3 | 54% ▲ |
Optimal v Hyeon Chung: +0.4±0.8 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +7.9 per 100 first serves in before the returner adjusts.
Ad court
| 1st serve | Now | Gilles wins | v Hyeon | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 40% | 67% | 74% | 69.0%±7.7 | 42% ▲ |
| Body | 9% | 64% | 60% | 61.3%±11.5 | 19% ▲ |
| T | 52% | 65% | 70% | 62.5%±8.6 | 39% ▼ |
Optimal v Hyeon Chung: +0.2±0.8 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +4.0 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.
Hyeon Chung returning
1st serve to the forehand
| Return | Now | Tour | Own | v Gilles | Value |
|---|---|---|---|---|---|
| FH through the middle | 55% | +4.3 | +1.1 | +3.6 | +9.0±2.4 |
| FH crosscourt | 25% | +5.5 | ±0.0 | +3.9 | +9.3±3.8 |
| FH down the line | 20% | +1.7 | +1.0 | +2.8 | +5.5±3.8 |
Lean FH crosscourt: +1.0±3.2 per 100 returns v the current mix (157 returns charted, inside the 90% margin)
1st serve to the backhand
| Return | Now | Tour | Own | v Gilles | Value |
|---|---|---|---|---|---|
| BH through the middle | 44% | +6.4 | +2.3 | +2.5 | +11.2±2.4 |
| BH crosscourt | 18% | +8.8 | −2.5 | +4.0 | +10.3±3.2 |
| BH down the line | 18% | +4.2 | −0.6 | +2.3 | +5.9±4.4 |
| BH slice through the middle | 14% | −4.2 | +0.2 | +3.5 | −0.4±2.1 |
| BH slice down the line | 6% | −8.4 | +1.2 | +4.0 | −3.2±3.0 |
Lean BH through the middle: +3.5±1.7 per 100 returns v the current mix (142 returns charted)
2nd serve to the forehand
| Return | Now | Tour | Own | v Gilles | Value |
|---|---|---|---|---|---|
| FH through the middle | 57% | −3.5 | +0.4 | −0.4 | −3.5±2.6 |
| FH down the line | 23% | −1.8 | −2.3 | +1.5 | −2.5±4.0 |
| FH crosscourt | 20% | −0.2 | −3.4 | +1.7 | −2.0±3.7 |
Lean FH crosscourt: +1.0±3.5 per 100 returns v the current mix (79 returns charted, inside the 90% margin)
2nd serve to the backhand
| Return | Now | Tour | Own | v Gilles | Value |
|---|---|---|---|---|---|
| BH through the middle | 53% | −2.9 | +1.9 | +2.4 | +1.4±2.2 |
| BH crosscourt | 36% | +1.0 | +0.6 | +2.1 | +3.7±2.7 |
| BH down the line | 10% | −0.2 | −2.6 | +1.3 | −1.4±3.8 |
Lean BH crosscourt: +1.8±2.1 per 100 returns v the current mix (96 returns charted, inside the 90% margin)
Gilles Simon returning
1st serve to the forehand
| Return | Now | Tour | Own | v Hyeon | Value |
|---|---|---|---|---|---|
| FH through the middle | 48% | +4.3 | +2.2 | +3.3 | +9.8±2.3 |
| FH crosscourt | 17% | +5.5 | +2.3 | +3.3 | +11.1±4.1 |
| FH down the line | 15% | +1.7 | +1.1 | +2.2 | +5.0±4.2 |
| FH slice through the middle | 12% | −4.2 | +0.1 | ±0.0 | −4.1±1.8 |
| FH slice down the line | 5% | −4.3 | −3.6 | ±0.0 | −7.9±2.3 |
Lean FH crosscourt: +4.7±3.6 per 100 returns v the current mix (1104 returns charted)
1st serve to the backhand
| Return | Now | Tour | Own | v Hyeon | Value |
|---|---|---|---|---|---|
| BH through the middle | 44% | +6.4 | +3.1 | +1.2 | +10.7±2.3 |
| BH crosscourt | 32% | +8.8 | +2.3 | −0.4 | +10.6±3.1 |
| BH down the line | 12% | +4.2 | +3.3 | −0.8 | +6.7±4.2 |
| BH slice through the middle | 5% | −4.2 | −0.4 | +2.5 | −2.2±2.5 |
| BH slice crosscourt | 4% | +0.5 | −4.2 | −0.2 | −3.9±3.0 |
Lean BH through the middle: +2.3±1.7 per 100 returns v the current mix (935 returns charted)
2nd serve to the forehand
| Return | Now | Tour | Own | v Hyeon | Value |
|---|---|---|---|---|---|
| FH through the middle | 55% | −3.5 | +1.7 | −0.8 | −2.6±2.7 |
| FH crosscourt | 34% | −0.2 | −1.1 | −4.1 | −5.5±4.0 |
| FH down the line | 10% | −1.8 | −0.5 | +3.3 | +0.9±4.5 |
Lean FH down the line: +4.1±4.5 per 100 returns v the current mix (294 returns charted, inside the 90% margin)
2nd serve to the backhand
| Return | Now | Tour | Own | v Hyeon | Value |
|---|---|---|---|---|---|
| BH crosscourt | 44% | +1.0 | +2.0 | −0.4 | +2.6±2.8 |
| BH through the middle | 36% | −2.9 | +1.5 | +2.8 | +1.4±2.2 |
| BH down the line | 11% | −0.2 | −0.7 | +1.2 | +0.3±4.7 |
| FH through the middle | 5% | −2.9 | +0.8 | −0.8 | −2.9±2.4 |
| FH inside-in | 3% | +0.6 | +1.0 | −4.1 | −2.6±3.9 |
Lean BH crosscourt: +1.1±1.9 per 100 returns v the current mix (719 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.
Hyeon Chung
Favour
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| FH to the middle · return | +5.0±2.0 | +1.2 | +3.7 |
| BH to the middle · return +1 | +4.8±2.2 | +2.9 | +1.9 |
| BH to the middle · return | +4.4±1.9 | +2.4 | +2.1 |
| FH to the middle · rally | +2.4±1.7 | +1.0 | +1.4 |
| FH to their forehand · return | +2.4±3.8 | −1.1 | +3.5 |
| FH to their forehand · serve +1 | +2.1±3.2 | −0.3 | +2.4 |
Avoid
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| BH to their forehand · rally | −2.7±3.1 | −2.0 | −0.6 |
| BH to their backhand · return +1 | −1.1±2.9 | −1.3 | +0.2 |
| BH to their backhand · serve +1 | −0.3±2.7 | −0.4 | ±0.0 |
| FH to their backhand · rally | ±0.0±2.2 | −1.1 | +1.1 |
| FH to their backhand · serve +1 | +0.4±3.0 | +0.1 | +0.4 |
Gilles Simon
Favour
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| FH to the middle · return | +5.1±2.0 | +2.2 | +2.9 |
| BH to the middle · return | +4.9±1.8 | +2.7 | +2.2 |
| FH to their backhand · return | +4.2±3.7 | +0.3 | +3.9 |
| FH to their backhand · return +1 | +3.6±3.6 | +3.2 | +0.4 |
| FH to their forehand · return +1 | +2.2±3.6 | +0.8 | +1.4 |
| FH to their backhand · rally | +1.8±1.9 | +1.0 | +0.8 |
Avoid
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| BH to their forehand · rally | −3.2±3.3 | +0.6 | −3.8 |
| BH slice to their backhand · rally | −2.5±2.5 | −2.7 | +0.2 |
| BH to their backhand · serve +1 | −0.6±2.8 | +0.4 | −1.0 |
| FH to the middle · serve +1 | −0.5±2.3 | +1.4 | −1.9 |
| FH to the middle · rally | ±0.0±1.7 | +2.1 | −2.0 |
Against Gilles Simon-like opponents
| Hyeon Chung v | Matches | Serve pts won | Return pts won |
|---|---|---|---|
| All charted opponents | – | 55.5% | 38.4% |
| Players most similar to Gilles Simon | 1 | 52.9% | 38.0% |
Similar by tactical fingerprint: Tomas Martin Etcheverry, Alex De Minaur, Daniil Medvedev, Jenson Brooksby, Miomir Kecmanovic, Diego Schwartzman, Andy Murray, John Millman, Aaron Krickstein. When two players have rarely met, their records against these lookalikes fill the gap.