Game plan
Quentin Halys v Sam Querrey
Every number combines what Quentin Halys does well with what Sam Querrey 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 At least one of them is no longer active or has too little charted in the last three seasons, so both are compared on their careers.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 Quentin Halys's record against Sam Querrey'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 | Quentin | Sam |
|---|---|---|
| Direction choice | +0.36 ±0.08 better than 99% | +0.16 ±0.10 better than 89% |
| Shot selection | −0.28 ±0.29 better than 25% | +0.50 ±0.22 better than 93% |
| Execution | +0.81 ±1.23 better than 92% | −0.88 ±0.95 better than 28% |
| Points left on the table | 2.16 ±0.23 lower than 96% | 2.35 ±0.18 lower than 79% |
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.
Quentin Halys serving
Deuce court
| 1st serve | Now | Quentin wins | v Sam | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 51% | 79% | 74% | 79.9%±5.6 | 64% ▲ |
| Body | 1% | 60% | 62% | 58.3%±16.2 | 0% ▼ |
| T | 48% | 79% | 79% | 82.7%±5.7 | 36% ▼ |
Optimal v Sam Querrey: +0.3±0.7 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +1.8 per 100 first serves in before the returner adjusts.
Ad court
| 1st serve | Now | Quentin wins | v Sam | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 50% | 81% | 77% | 84.5%±5.9 | 63% ▲ |
| Body | 2% | 63% | 70% | 69.5%±14.4 | 0% ▼ |
| T | 48% | 76% | 74% | 77.9%±6.7 | 37% ▼ |
Optimal v Sam Querrey: +0.2±0.8 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.
Sam Querrey serving
Deuce court
| 1st serve | Now | Sam wins | v Quentin | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 46% | 76% | 82% | 84.3%±5.1 | 38% ▼ |
| Body | 5% | 67% | 68% | 72.1%±13.6 | 0% ▼ |
| T | 49% | 82% | 85% | 90.0%±3.9 | 62% ▲ |
Optimal v Quentin Halys: +0.8±0.7 per 100 first serves (faults included) over the current mix. Serving T every time would read +3.5 per 100 first serves in before the returner adjusts.
Ad court
| 1st serve | Now | Sam wins | v Quentin | Matchup | Optimal |
|---|---|---|---|---|---|
| Wide | 51% | 81% | 83% | 88.6%±4.3 | 64% ▲ |
| Body | 6% | 62% | 57% | 55.7%±16.1 | 0% ▼ |
| T | 44% | 74% | 81% | 82.4%±6.2 | 36% ▼ |
Optimal v Quentin Halys: +1.1±0.7 per 100 first serves (faults included) over the current mix. Serving wide every time would read +4.5 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.
Quentin Halys returning
1st serve to the forehand
| Return | Now | Tour | Own | v Sam | Value |
|---|---|---|---|---|---|
| FH through the middle | 32% | +4.3 | −1.1 | −2.7 | +0.5±3.0 |
| FH crosscourt | 20% | +5.5 | +3.2 | +0.3 | +8.9±4.4 |
| FH slice through the middle | 19% | −4.2 | +1.9 | +2.9 | +0.6±2.3 |
| FH down the line | 14% | +1.7 | +2.0 | −2.8 | +0.9±4.4 |
| FH slice down the line | 8% | −4.3 | +1.3 | +3.6 | +0.6±2.9 |
Lean FH crosscourt: +7.0±3.7 per 100 returns v the current mix (166 returns charted)
1st serve to the backhand
| Return | Now | Tour | Own | v Sam | Value |
|---|---|---|---|---|---|
| BH crosscourt | 40% | +8.8 | +2.5 | −0.5 | +10.8±3.6 |
| BH through the middle | 30% | +6.4 | −2.5 | −1.0 | +3.0±2.8 |
| BH slice through the middle | 14% | −4.2 | +0.8 | +0.8 | −2.6±2.4 |
| BH slice crosscourt | 8% | +0.5 | −0.2 | +1.0 | +1.3±2.8 |
| BH down the line | 4% | +4.2 | −1.2 | +2.4 | +5.4±3.6 |
Lean BH crosscourt: +6.0±2.4 per 100 returns v the current mix (177 returns charted)
2nd serve to the forehand
| Return | Now | Tour | Own | v Sam | Value |
|---|---|---|---|---|---|
| FH through the middle | 44% | −3.5 | −1.6 | +0.5 | −4.6±2.7 |
| FH crosscourt | 38% | −0.2 | +1.8 | +2.9 | +4.5±4.2 |
| FH down the line | 18% | −1.8 | +0.3 | −0.6 | −2.1±4.1 |
Lean FH crosscourt: +5.2±3.0 per 100 returns v the current mix (50 returns charted)
2nd serve to the backhand
| Return | Now | Tour | Own | v Sam | Value |
|---|---|---|---|---|---|
| BH crosscourt | 58% | +1.0 | −0.1 | ±0.0 | +0.9±3.2 |
| BH through the middle | 27% | −2.9 | +0.6 | −1.3 | −3.6±2.4 |
| BH down the line | 11% | −0.2 | +1.5 | +0.4 | +1.7±4.4 |
| FH through the middle | 4% | −2.9 | +0.4 | +0.5 | −2.0±1.9 |
Lean BH crosscourt: +1.2±1.5 per 100 returns v the current mix (113 returns charted, inside the 90% margin)
Sam Querrey returning
1st serve to the forehand
| Return | Now | Tour | Own | v Quentin | Value |
|---|---|---|---|---|---|
| FH through the middle | 45% | +4.3 | −0.5 | +2.4 | +6.2±2.8 |
| FH crosscourt | 25% | +5.5 | −0.7 | +1.1 | +5.9±4.3 |
| FH down the line | 15% | +1.7 | +0.8 | −0.4 | +2.0±4.5 |
| FH slice through the middle | 9% | −4.2 | ±0.0 | +0.8 | −3.4±2.2 |
| FH slice down the line | 4% | −4.3 | +1.8 | +1.3 | −1.2±2.6 |
Lean FH through the middle: +2.0±2.0 per 100 returns v the current mix (365 returns charted)
1st serve to the backhand
| Return | Now | Tour | Own | v Quentin | Value |
|---|---|---|---|---|---|
| BH through the middle | 40% | +6.4 | −1.0 | +0.8 | +6.2±2.8 |
| BH crosscourt | 33% | +8.8 | +0.9 | −0.3 | +9.3±3.4 |
| BH slice through the middle | 10% | −4.2 | +0.8 | +1.1 | −2.3±2.4 |
| BH down the line | 9% | +4.2 | +1.2 | +0.4 | +5.8±4.0 |
| BH slice crosscourt | 5% | +0.5 | −1.8 | −1.0 | −2.2±2.5 |
Lean BH crosscourt: +3.8±2.5 per 100 returns v the current mix (297 returns charted)
2nd serve to the forehand
| Return | Now | Tour | Own | v Quentin | Value |
|---|---|---|---|---|---|
| FH through the middle | 49% | −3.5 | −1.1 | +2.8 | −1.8±2.9 |
| FH crosscourt | 34% | −0.2 | +0.8 | +0.3 | +0.9±4.1 |
| FH down the line | 18% | −1.8 | +0.1 | +0.2 | −1.5±4.3 |
Lean FH crosscourt: +1.7±3.1 per 100 returns v the current mix (80 returns charted, inside the 90% margin)
2nd serve to the backhand
| Return | Now | Tour | Own | v Quentin | Value |
|---|---|---|---|---|---|
| BH crosscourt | 40% | +1.0 | +2.0 | +2.3 | +5.4±3.2 |
| BH through the middle | 37% | −2.9 | −0.2 | +0.9 | −2.3±2.5 |
| BH down the line | 19% | −0.2 | −0.8 | +2.8 | +1.8±4.8 |
| FH through the middle | 3% | −2.9 | +0.7 | +2.8 | +0.6±2.0 |
Lean BH crosscourt: +3.7±2.3 per 100 returns v the current mix (179 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 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.
Quentin Halys
Favour
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| FH to their forehand · return | +3.9±5.3 | +2.1 | +1.8 |
| FH to their forehand · rally | +2.2±4.3 | −1.1 | +3.2 |
| FH to their backhand · serve +1 | +0.9±4.2 | +0.9 | ±0.0 |
| BH to their backhand · return +1 | +0.8±4.0 | +1.4 | −0.6 |
| BH to their backhand · serve +1 | +0.6±3.8 | −0.5 | +1.1 |
| BH to their backhand · rally | +0.6±3.3 | −0.2 | +0.8 |
Avoid
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| FH to the middle · return | −4.4±3.1 | −2.4 | −1.9 |
| BH to the middle · return | −3.8±2.9 | −1.2 | −2.6 |
| BH slice to their backhand · rally | −2.5±3.1 | −2.9 | +0.4 |
| FH to their forehand · serve +1 | −1.3±4.9 | −3.6 | +2.3 |
| FH to their backhand · rally | −0.9±4.0 | −2.0 | +1.1 |
Sam Querrey
Favour
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| FH to their backhand · serve +1 | +6.9±4.3 | +1.5 | +5.4 |
| FH to their forehand · serve +1 | +5.0±4.7 | −1.8 | +6.9 |
| BH to their backhand · return +1 | +2.6±3.3 | +0.1 | +2.5 |
| BH to their backhand · return | +2.5±3.0 | +1.8 | +0.7 |
| BH to their backhand · serve +1 | +2.2±3.8 | −2.1 | +4.3 |
| BH to the middle · rally | +1.9±2.8 | −0.1 | +2.0 |
Avoid
| Shot | Edge | Own | Theirs |
|---|---|---|---|
| BH to the middle · return | −1.5±2.8 | +0.4 | −1.9 |
| FH to their backhand · return | −0.9±4.1 | −0.7 | −0.1 |
| FH to the middle · rally | −0.8±3.1 | −1.9 | +1.1 |
| BH to their backhand · rally | +0.3±3.3 | −1.1 | +1.5 |
| FH to the middle · return | +0.5±3.0 | −1.8 | +2.2 |
Against Sam Querrey-like opponents
| Quentin Halys v | Matches | Serve pts won | Return pts won |
|---|---|---|---|
| All charted opponents | – | 65.7% | 26.2% |
Similar by tactical fingerprint: Joao Fonseca, Sebastian Korda, Alexei Popyrin, Zizou Bergs, Marin Cilic, Roman Safiullin, Lucas Pouille, Lloyd Harris, Jo Wilfried Tsonga. When two players have rarely met, their records against these lookalikes fill the gap.