RallyIQ

Game plan

Ethan Quinn v Alexei Popyrin

Every number combines what Ethan Quinn does well with what Alexei Popyrin allows, each measured against the tour average and shrunk toward it when the sample is thin. Flip perspective

Forecast

Ethan Quinn wins, best of 3 63%90%: 27%–90% · best of 5: 66%
Serve points won 69.0% / 66.3% Ethan / Alexei · tour 65.7%
Strengths only, no similarity priors 61%serve 68.6% / 66.3%

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. Both were charted enough in the last three seasons, so those carry the most weight. The result is then nudged by Ethan Quinn's record against Alexei Popyrin's tactical lookalikes and in their charted head-to-heads (lookalikes: +2.5 on serve, +0.5 on return vs expectation (589 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

CareerEthanAlexei
Direction choice−0.06 ±0.07
better than 41%
+0.04 ±0.06
better than 69%
Shot selection±0.00 ±0.19
better than 53%
+0.29 ±0.15
better than 79%
Execution−2.26 ±0.66
better than 1%
−0.73 ±0.59
better than 36%
Points left on the table2.56 ±0.15
lower than 55%
2.71 ±0.10
lower than 39%

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.

Ethan Quinn serving

Deuce court

1st serveNowEthan winsv AlexeiMatchupOptimal
Wide41%70%73%69.8%±7.041%
Body15%62%64%62.1%±11.62% ▼
T44%78%75%77.6%±6.657% ▲

Optimal v Alexei Popyrin: +1.0±0.9 per 100 first serves (faults included) over the current mix. Serving T every time would read +5.6 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowEthan winsv AlexeiMatchupOptimal
Wide41%75%74%76.1%±7.151% ▲
Body9%67%69%72.3%±11.80% ▼
T50%71%73%72.8%±7.049% ▼

Optimal v Alexei Popyrin: +0.4±0.7 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +2.0 per 100 first serves in before the returner adjusts.

Alexei Popyrin serving

Deuce court

1st serveNowAlexei winsv EthanMatchupOptimal
Wide45%73%72%72.3%±6.859% ▲
Body9%62%62%60.7%±12.50% ▼
T45%78%70%74.1%±6.841% ▼

Optimal v Ethan Quinn: +0.7±0.8 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +2.0 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowAlexei winsv EthanMatchupOptimal
Wide52%76%77%80.3%±6.244% ▼
Body5%63%54%53.9%±14.40% ▼
T43%74%74%75.7%±6.856% ▲

Optimal v Ethan Quinn: +0.4±0.8 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +3.4 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.

Ethan Quinn returning

1st serve to the forehand

ReturnNowTourOwnv AlexeiValue
FH slice through the middle46%−4.2−0.3+0.3−4.2±2.3
FH slice crosscourt28%−4.3−1.0−0.8−6.1±2.8
FH through the middle10%+4.3−1.3+1.7+4.7±2.5
FH crosscourt8%+5.5−0.5+1.7+6.7±3.9
FH slice down the line6%−4.3−2.8+1.5−5.6±2.8

Lean FH crosscourt: +9.8±3.9 per 100 returns v the current mix (189 returns charted)

1st serve to the backhand

ReturnNowTourOwnv AlexeiValue
BH through the middle32%+6.4−2.5+0.5+4.5±2.5
BH crosscourt21%+8.8−1.9−0.9+6.0±3.3
BH down the line21%+4.2−3.2+1.0+2.0±4.6
BH slice through the middle14%−4.2−2.6−2.0−8.8±2.4
BH slice crosscourt9%+0.5−2.7−3.4−5.6±2.8

Lean BH crosscourt: +5.0±2.9 per 100 returns v the current mix (172 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv AlexeiValue
FH through the middle52%−3.5+0.3+0.3−2.8±2.6
FH crosscourt28%−0.2+1.9+1.5+3.2±4.0
FH slice crosscourt11%−12.5−0.2±0.0−12.7±1.4
FH slice through the middle9%−12.7−0.3−0.3−13.2±1.6

Lean FH crosscourt: +6.4±3.2 per 100 returns v the current mix (54 returns charted)

2nd serve to the backhand

ReturnNowTourOwnv AlexeiValue
BH through the middle38%−2.9±0.0−0.4−3.3±2.3
BH crosscourt34%+1.0+0.5−2.2−0.7±2.9
BH down the line12%−0.2−5.3+3.2−2.3±4.6
FH through the middle12%−2.9+0.5+0.3−2.1±2.1
FH inside-out5%+1.0+0.8−3.4−1.7±3.0

Lean BH crosscourt: +1.4±2.2 per 100 returns v the current mix (127 returns charted, inside the 90% margin)

Alexei Popyrin returning

1st serve to the forehand

ReturnNowTourOwnv EthanValue
FH through the middle44%+4.3+1.5−2.2+3.6±2.7
FH down the line21%+1.7+1.8−6.4−2.9±4.3
FH crosscourt19%+5.5+3.3−2.1+6.7±4.2
FH slice through the middle11%−4.2−1.3−0.6−6.1±2.3
FH slice down the line4%−4.3−0.6−0.8−5.6±2.8

Lean FH crosscourt: +5.4±3.7 per 100 returns v the current mix (584 returns charted)

1st serve to the backhand

ReturnNowTourOwnv EthanValue
BH through the middle41%+6.4+1.0−1.7+5.7±2.5
BH down the line20%+4.2−1.4−0.4+2.4±4.1
BH slice through the middle15%−4.2+0.8−3.1−6.6±2.4
BH crosscourt13%+8.8+1.6−0.1+10.3±3.6
BH slice crosscourt7%+0.5−3.0−4.0−6.4±2.8

Lean BH crosscourt: +8.2±3.4 per 100 returns v the current mix (633 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv EthanValue
FH through the middle47%−3.5−0.9−0.8−5.2±2.9
FH crosscourt32%−0.2+5.2−0.3+4.7±4.2
FH down the line21%−1.8−4.1−0.4−6.3±4.4

Lean FH crosscourt: +6.9±3.3 per 100 returns v the current mix (139 returns charted)

2nd serve to the backhand

ReturnNowTourOwnv EthanValue
BH through the middle37%−2.9−4.1+0.5−6.5±2.4
BH down the line21%−0.2−1.5−0.1−1.9±4.7
BH crosscourt18%+1.0−3.2−2.4−4.5±3.2
FH through the middle10%−2.9−2.4−0.8−6.0±2.4
FH inside-out9%+1.0−1.3−0.4−0.7±3.5

Lean FH inside-out: +3.8±3.5 per 100 returns v the current mix (463 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 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.

Ethan Quinn

Favour

ShotEdgeOwnTheirs
BH to their backhand · return +1+7.3±5.3+0.9+6.4
BH slice to their backhand · rally+2.8±3.6+4.1−1.3
FH to their backhand · rally+1.8±5.0+2.5−0.7
FH to the middle · return+0.8±4.0−1.9+2.7
FH to the middle · rally+0.4±3.5−3.2+3.5
FH to their forehand · serve +1±0.0±5.6−3.2+3.3

Avoid

ShotEdgeOwnTheirs
BH to their backhand · return−7.3±5.0−1.4−5.8
BH to their backhand · serve +1−5.9±4.7−6.7+0.9
BH to their backhand · rally−3.6±4.1−4.3+0.7
FH to their backhand · serve +1−2.7±5.4−3.0+0.3
BH to their forehand · return−2.7±5.8−5.4+2.8

Alexei Popyrin

Favour

ShotEdgeOwnTheirs
FH to the middle · rally+3.3±3.5+0.6+2.7
FH to their forehand · serve +1+1.8±5.4+1.4+0.4
FH to their forehand · rally+0.3±5.2+1.7−1.4
BH to the middle · return−0.8±3.6−0.7−0.1
BH to their backhand · serve +1−1.6±4.3+0.3−1.9
FH to the middle · serve +1−1.6±3.5+0.1−1.7

Avoid

ShotEdgeOwnTheirs
FH to their backhand · serve +1−7.9±5.3−1.8−6.0
BH to their backhand · rally−7.2±4.0−4.8−2.4
BH to the middle · rally−6.7±3.1−3.1−3.6
FH to the middle · return−6.1±3.9−2.0−4.0
BH to their backhand · return−2.9±4.9−2.2−0.6

Against Alexei Popyrin-like opponents

Ethan Quinn vMatchesServe pts wonReturn pts won
All charted opponents–63.9%36.8%
Players most similar to Alexei Popyrin3 67.5%34.3%

Similar by tactical fingerprint: Stefanos Tsitsipas, Joao Fonseca, Hubert Hurkacz, Tallon Griekspoor, Zizou Bergs, Thanasi Kokkinakis, Dominic Thiem, Lucas Pouille, Lloyd Harris, Jo Wilfried Tsonga. When two players have rarely met, their records against these lookalikes fill the gap.