Game plan
Roman Safiullin v Hyeon Chung
Every number combines what Roman Safiullin does well with what Hyeon Chung 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 At least one of them is no longer active or has too little charted in the last three seasons, so both are compared on their careers.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 Roman Safiullin's record against Hyeon Chung's tactical lookalikes and in their charted head-to-heads. 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 | Roman | Hyeon |
|---|---|---|
| Direction choice | +0.11 ±0.07 better than 83% | −0.27 ±0.10 better than 7% |
| Shot selection | +0.42 ±0.20 better than 88% | −0.08 ±0.26 better than 42% |
| Execution | −0.74 ±0.73 better than 35% | −0.07 ±1.07 better than 65% |
| Points left on the table | 2.11 ±0.16 lower than 98% | 2.47 ±0.15 lower than 66% |
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.
Roman Safiullin serving
Deuce court
| 1st serve | Now | Roman wins | v Hyeon | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 51% | 70% | 72% | 69.5%±7.7 | 45% ▼ |
| Body | 7% | 49% | 49% | 34.6%±12.9 | 0% ▼ |
| T | 42% | 73% | 78% | 76.5%±8.1 | 55% ▲ |
Optimal v Hyeon Chung: +0.8±0.8 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +6.7 per 100 first serves in before the returner adjusts.
Ad court
| 1st serve | Now | Roman wins | v Hyeon | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 47% | 75% | 74% | 76.7%±7.5 | 60% ▲ |
| Body | 15% | 63% | 60% | 60.1%±13.2 | 2% ▼ |
| T | 38% | 66% | 70% | 63.2%±10.0 | 38% |
Optimal v Hyeon Chung: +1.3±1.0 per 100 first serves (faults included) over the current mix. Serving wide every time would read +7.6 per 100 first serves in before the returner adjusts.
Hyeon Chung serving
Deuce court
| 1st serve | Now | Hyeon wins | v Roman | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 44% | 65% | 73% | 65.0%±8.2 | 57% ▲ |
| Body | 15% | 59% | 66% | 61.6%±12.9 | 2% ▼ |
| T | 41% | 69% | 77% | 71.4%±8.3 | 41% |
Optimal v Roman Safiullin: +0.4±1.0 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +4.2 per 100 first serves in before the returner adjusts.
Ad court
| 1st serve | Now | Hyeon wins | v Roman | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 37% | 61% | 74% | 62.6%±9.7 | 37% |
| Body | 20% | 60% | 64% | 60.4%±13.3 | 7% ▼ |
| T | 43% | 65% | 75% | 68.1%±9.0 | 56% ▲ |
Optimal v Roman Safiullin: +0.9±1.0 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +3.6 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.
Roman Safiullin returning
1st serve to the forehand
| Return | Now | Tour | Own | v Hyeon | Value |
|---|---|---|---|---|---|
| FH through the middle | 39% | +4.3 | +2.3 | +3.3 | +9.9±2.8 |
| FH crosscourt | 17% | +5.5 | −0.4 | +3.3 | +8.4±4.4 |
| FH slice through the middle | 17% | −4.2 | −0.7 | ±0.0 | −4.9±2.0 |
| FH down the line | 10% | +1.7 | −1.2 | +2.2 | +2.7±4.5 |
| FH slice crosscourt | 10% | −4.3 | −0.3 | ±0.0 | −4.6±1.9 |
Lean FH through the middle: +6.0±2.0 per 100 returns v the current mix (282 returns charted)
1st serve to the backhand
| Return | Now | Tour | Own | v Hyeon | Value |
|---|---|---|---|---|---|
| BH crosscourt | 40% | +8.8 | −0.3 | −0.4 | +8.1±3.4 |
| BH through the middle | 39% | +6.4 | −1.6 | +1.2 | +6.0±2.7 |
| BH down the line | 8% | +4.2 | −0.8 | −0.8 | +2.6±4.2 |
| BH slice through the middle | 6% | −4.2 | −1.5 | +2.5 | −3.3±2.4 |
| BH slice crosscourt | 5% | +0.5 | −0.2 | −0.2 | +0.1±2.8 |
Lean BH crosscourt: +2.6±2.3 per 100 returns v the current mix (323 returns charted)
2nd serve to the forehand
| Return | Now | Tour | Own | v Hyeon | Value |
|---|---|---|---|---|---|
| FH through the middle | 47% | −3.5 | +1.5 | −0.8 | −2.8±2.9 |
| FH crosscourt | 32% | −0.2 | −2.4 | −4.1 | −6.8±4.0 |
| FH down the line | 15% | −1.8 | −0.8 | +3.3 | +0.7±4.1 |
| FH slice crosscourt | 7% | −12.5 | −2.2 | ±0.0 | −14.7±1.3 |
Lean FH through the middle: +1.6±2.1 per 100 returns v the current mix (75 returns charted, inside the 90% margin)
2nd serve to the backhand
| Return | Now | Tour | Own | v Hyeon | Value |
|---|---|---|---|---|---|
| BH crosscourt | 51% | +1.0 | −1.7 | −0.4 | −1.2±3.2 |
| BH through the middle | 38% | −2.9 | −1.5 | +2.8 | −1.6±2.5 |
| BH down the line | 10% | −0.2 | +0.4 | +1.2 | +1.4±4.4 |
Lean BH down the line: +2.5±4.4 per 100 returns v the current mix (175 returns charted, inside the 90% margin)
Hyeon Chung returning
1st serve to the forehand
| Return | Now | Tour | Own | v Roman | Value |
|---|---|---|---|---|---|
| FH through the middle | 55% | +4.3 | +1.1 | +0.9 | +6.3±2.9 |
| FH crosscourt | 25% | +5.5 | ±0.0 | +3.0 | +8.4±4.4 |
| FH down the line | 20% | +1.7 | +1.0 | +1.2 | +3.9±4.5 |
Lean FH crosscourt: +2.1±3.8 per 100 returns v the current mix (157 returns charted, inside the 90% margin)
1st serve to the backhand
| Return | Now | Tour | Own | v Roman | Value |
|---|---|---|---|---|---|
| BH through the middle | 44% | +6.4 | +2.3 | +0.6 | +9.3±2.7 |
| BH crosscourt | 18% | +8.8 | −2.5 | +0.2 | +6.4±3.5 |
| BH down the line | 18% | +4.2 | −0.6 | ±0.0 | +3.6±4.5 |
| BH slice through the middle | 14% | −4.2 | +0.2 | −0.8 | −4.7±2.4 |
| BH slice down the line | 6% | −8.4 | +1.2 | −0.5 | −7.7±2.7 |
Lean BH through the middle: +4.5±1.9 per 100 returns v the current mix (142 returns charted)
2nd serve to the forehand
| Return | Now | Tour | Own | v Roman | Value |
|---|---|---|---|---|---|
| FH through the middle | 57% | −3.5 | +0.4 | +1.3 | −1.8±2.8 |
| FH down the line | 23% | −1.8 | −2.3 | +0.9 | −3.2±4.5 |
| FH crosscourt | 20% | −0.2 | −3.4 | +2.1 | −1.5±4.1 |
Lean FH crosscourt: +0.5±3.8 per 100 returns v the current mix (79 returns charted, inside the 90% margin)
2nd serve to the backhand
| Return | Now | Tour | Own | v Roman | Value |
|---|---|---|---|---|---|
| BH through the middle | 53% | −2.9 | +1.9 | +0.7 | −0.3±2.5 |
| BH crosscourt | 36% | +1.0 | +0.6 | −1.6 | ±0.0±3.3 |
| BH down the line | 10% | −0.2 | −2.6 | −0.2 | −3.0±4.3 |
Lean BH crosscourt: +0.5±2.5 per 100 returns v the current mix (96 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 clay. Each player's clay record is shrunk toward their all-surface one, so a thin sample on it moves the numbers only a little.
Roman Safiullin
Favour
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| BH to their backhand · serve +1 | +3.2±3.9 | +4.2 | −1.0 |
| FH to their backhand · rally | +2.9±4.2 | +0.2 | +2.7 |
| FH to the middle · return | +1.8±3.5 | +1.5 | +0.3 |
| FH to their forehand · return +1 | +1.5±4.3 | +0.1 | +1.4 |
| FH to their backhand · return | +1.2±4.2 | −2.6 | +3.9 |
| FH to the middle · return +1 | +1.1±2.8 | +1.3 | −0.2 |
Avoid
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| BH to their backhand · return | −5.8±3.6 | −4.7 | −1.1 |
| FH to their forehand · rally | −5.8±4.8 | −6.8 | +1.0 |
| BH to their backhand · rally | −3.9±3.5 | −4.1 | +0.2 |
| FH to the middle · rally | −2.4±3.1 | −0.8 | −1.6 |
| BH to the middle · rally | −1.3±2.4 | −1.5 | +0.2 |
Hyeon Chung
Favour
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| FH to their backhand · rally | +6.1±4.5 | +0.3 | +5.8 |
| BH to their forehand · rally | +3.4±5.6 | +0.3 | +3.2 |
| BH to the middle · return +1 | +2.8±3.0 | +2.9 | −0.1 |
| BH to their backhand · rally | +2.6±3.6 | −0.5 | +3.1 |
| FH to the middle · rally | +2.0±3.1 | +0.2 | +1.8 |
| FH to their forehand · return | +1.9±4.5 | −1.1 | +3.0 |
Avoid
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| BH to their backhand · return +1 | −2.5±3.5 | −1.3 | −1.1 |
| FH to the middle · return | −1.0±3.4 | +1.5 | −2.5 |
| BH to their backhand · return | −0.9±3.8 | −1.0 | ±0.0 |
| FH to their backhand · serve +1 | −0.9±4.8 | +0.3 | −1.2 |
| BH to their backhand · serve +1 | −0.2±3.7 | −0.4 | +0.2 |
Against Hyeon Chung-like opponents
| Roman Safiullin v | Matches | Serve pts won | Return pts won |
|---|---|---|---|
| All charted opponents | – | 61.3% | 32.7% |
Similar by tactical fingerprint: Alex De Minaur, Botic Van De Zandschulp, Jenson Brooksby, Miomir Kecmanovic, Alexandre Muller, Diego Schwartzman, Emil Ruusuvuori, John Millman, Ilya Ivashka, Andreas Seppi. When two players have rarely met, their records against these lookalikes fill the gap.