RallyIQ

Game plan

Quentin Halys v Thiago Seyboth Wild

Every number combines what Quentin Halys does well with what Thiago Seyboth Wild allows, each measured against the tour average and shrunk toward it when the sample is thin. Flip perspective

Forecast

Quentin Halys wins, best of 3 40%90%: 13%–74% · best of 5: 38%
Serve points won 67.6% / 69.7% Quentin / Thiago · tour 65.7%
Strengths only, no similarity priors 41%serve 67.8% / 69.8%

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 At least one of them is no longer active or has too little charted in the last three seasons, so both are compared on their careers.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 Thiago Seyboth Wild's tactical lookalikes and in their charted head-to-heads (lookalikes: −3.4 on serve, +1.8 on return vs expectation (185 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

CareerQuentinThiago
Direction choice+0.36 ±0.08
better than 99%
−0.07 ±0.10
better than 38%
Shot selection−0.28 ±0.29
better than 25%
+0.05 ±0.27
better than 59%
Execution+0.81 ±1.23
better than 92%
−0.65 ±0.44
better than 39%
Points left on the table2.16 ±0.23
lower than 96%
2.74 ±0.17
lower than 36%

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 serveNowQuentin winsv ThiagoMatchupOptimal
Wide51%79%75%80.5%±5.864% ▲
Body1%60%55%51.9%±16.60% ▼
T48%79%74%77.6%±6.736% ▼

Optimal v Thiago Seyboth Wild: +1.0±0.8 per 100 first serves (faults included) over the current mix. Serving wide every time would read +1.8 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowQuentin winsv ThiagoMatchupOptimal
Wide50%81%75%82.8%±6.263% ▲
Body2%63%55%54.1%±17.10% ▼
T48%76%70%74.4%±7.537% ▼

Optimal v Thiago Seyboth Wild: +0.5±0.8 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +4.6 per 100 first serves in before the returner adjusts.

Thiago Seyboth Wild serving

Deuce court

1st serveNowThiago winsv QuentinMatchupOptimal
Wide49%68%82%77.9%±6.557% ▲
Body6%62%68%67.4%±14.00% ▼
T45%71%85%82.5%±6.143% ▼

Optimal v Quentin Halys: +0.4±0.5 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +3.1 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowThiago winsv QuentinMatchupOptimal
Wide59%69%83%79.8%±6.351% ▼
Body5%68%57%62.3%±16.10% ▼
T36%70%81%79.7%±7.049% ▲

Optimal v Quentin Halys: +0.3±0.8 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +0.9 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

ReturnNowTourOwnv ThiagoValue
FH through the middle32%+4.3−1.1+2.0+5.2±2.9
FH crosscourt20%+5.5+3.2+3.4+12.1±4.4
FH slice through the middle19%−4.2+1.9−1.1−3.4±2.2
FH down the line14%+1.7+2.0−0.4+3.3±4.3
FH slice down the line8%−4.3+1.3−0.9−3.9±2.3

Lean FH crosscourt: +8.8±3.7 per 100 returns v the current mix (166 returns charted)

1st serve to the backhand

ReturnNowTourOwnv ThiagoValue
BH crosscourt40%+8.8+2.5+2.5+13.9±3.4
BH through the middle30%+6.4−2.5+0.7+4.6±2.6
BH slice through the middle14%−4.2+0.8−0.5−3.9±2.3
BH slice crosscourt8%+0.5−0.2−1.6−1.3±2.6
BH down the line4%+4.2−1.2+1.9+4.9±3.9

Lean BH crosscourt: +7.9±2.2 per 100 returns v the current mix (177 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv ThiagoValue
FH through the middle44%−3.5−1.6+0.5−4.6±2.8
FH crosscourt38%−0.2+1.8+2.7+4.3±4.1
FH down the line18%−1.8+0.3−1.1−2.5±4.1

Lean FH crosscourt: +5.1±2.9 per 100 returns v the current mix (50 returns charted)

2nd serve to the backhand

ReturnNowTourOwnv ThiagoValue
BH crosscourt58%+1.0−0.1+0.6+1.5±3.2
BH through the middle27%−2.9+0.6−0.5−2.8±2.4
BH down the line11%−0.2+1.5−4.1−2.8±4.5
FH through the middle4%−2.9+0.4+0.5−2.0±2.0

Lean BH crosscourt: +1.8±1.5 per 100 returns v the current mix (113 returns charted)

Thiago Seyboth Wild returning

1st serve to the forehand

ReturnNowTourOwnv QuentinValue
FH through the middle44%+4.3+1.2+2.4+7.9±2.9
FH down the line18%+1.7−0.7−0.4+0.6±4.5
FH slice through the middle14%−4.2−1.7+0.8−5.1±2.2
FH crosscourt12%+5.5−1.4+1.1+5.2±4.4
FH slice down the line6%−4.3−0.5+1.3−3.5±2.7

Lean FH through the middle: +5.0±1.9 per 100 returns v the current mix (311 returns charted)

1st serve to the backhand

ReturnNowTourOwnv QuentinValue
BH through the middle42%+6.4+0.4+0.8+7.6±2.7
BH crosscourt26%+8.8−0.3−0.3+8.1±3.4
BH down the line13%+4.2−0.9+0.4+3.8±4.1
BH slice through the middle10%−4.2−1.8+1.1−4.9±2.4
BH slice crosscourt6%+0.5−0.2−1.0−0.7±2.6

Lean BH crosscourt: +3.3±2.8 per 100 returns v the current mix (374 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv QuentinValue
FH through the middle52%−3.5±0.0+2.8−0.7±2.9
FH down the line30%−1.8−2.9+0.2−4.5±4.5
FH crosscourt18%−0.2+2.6+0.3+2.7±3.7

Lean FH through the middle: +0.5±2.1 per 100 returns v the current mix (73 returns charted, inside the 90% margin)

2nd serve to the backhand

ReturnNowTourOwnv QuentinValue
BH through the middle39%−2.9−1.2+0.9−3.2±2.4
BH crosscourt31%+1.0+0.4+2.3+3.8±3.3
FH through the middle10%−2.9±0.0+2.8−0.1±2.4
BH down the line10%−0.2+2.1+2.8+4.6±4.6
FH inside-out7%+1.0−1.8+0.2−0.6±3.4

Lean BH down the line: +4.2±4.4 per 100 returns v the current mix (210 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.

Quentin Halys

Favour

ShotEdgeOwnTheirs
FH to their forehand · return+9.5±5.8+5.0+4.6
FH to their backhand · serve +1+8.1±5.4+4.0+4.1
BH to their backhand · return +1+3.5±5.0+2.7+0.8
BH to the middle · return+0.3±3.7−0.1+0.4
BH to their backhand · serve +1+0.2±4.9+1.7−1.5
FH to their forehand · rally±0.0±5.3−3.1+3.1

Avoid

ShotEdgeOwnTheirs
FH to their backhand · rally−5.9±5.2−3.3−2.6
FH to their forehand · serve +1−5.2±5.9−2.1−3.1
BH to their backhand · rally−3.2±4.2−3.9+0.7
BH to their forehand · rally−2.7±5.8−4.5+1.8
BH to their backhand · return−2.3±5.0−3.7+1.4

Thiago Seyboth Wild

Favour

ShotEdgeOwnTheirs
FH to their backhand · serve +1+9.2±5.3+2.6+6.6
FH to their backhand · rally+6.7±5.1+0.7+6.0
FH to their forehand · serve +1+6.5±5.6+0.4+6.1
BH to the middle · rally+5.2±3.3+3.0+2.2
FH to the middle · return+5.1±4.1+1.1+4.0
BH to their backhand · serve +1+5.1±4.9−1.1+6.1

Avoid

ShotEdgeOwnTheirs
FH to their backhand · return−1.5±6.2−2.1+0.6
BH to the middle · return−0.6±3.7+0.6−1.1
BH to their backhand · return−0.4±5.3−2.4+2.0
BH to their backhand · return +1+0.8±5.6−1.4+2.2
FH to the middle · rally+2.1±3.8+0.4+1.6

Against Thiago Seyboth Wild-like opponents

Quentin Halys vMatchesServe pts wonReturn pts won
All charted opponents–65.7%26.2%
Players most similar to Thiago Seyboth Wild1 62.2%28.4%

Similar by tactical fingerprint: Stefanos Tsitsipas, Flavio Cobolli, Joao Fonseca, Hubert Hurkacz, Alexei Popyrin, Francisco Cerundolo, Aleksandar Vukic, Dominic Thiem, Lloyd Harris, Juan Ignacio Londero. When two players have rarely met, their records against these lookalikes fill the gap.