RallyIQ

Game plan

Ethan Quinn v Kevin Anderson

Every number combines what Ethan Quinn does well with what Kevin Anderson 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 43%90%: 13%–78% · best of 5: 41%
Serve points won 64.7% / 66.2% Ethan / Kevin · tour 61.3%
Strengths only, no similarity priors 43%serve 64.7% / 66.2%

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 At least one of them is no longer active or has too little charted in the last three seasons, so both are compared on their careers.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 Ethan Quinn's record against Kevin Anderson'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

CareerEthanKevin
Direction choice−0.06 ±0.07
better than 41%
+0.05 ±0.10
better than 71%
Shot selection±0.00 ±0.19
better than 53%
+0.16 ±0.17
better than 70%
Execution−2.26 ±0.66
better than 1%
−0.37 ±0.61
better than 51%
Points left on the table2.56 ±0.15
lower than 55%
2.35 ±0.13
lower than 78%

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 KevinMatchupOptimal
Wide41%70%76%72.7%±6.941%
Body15%62%67%65.5%±11.22% ▼
T44%78%80%82.2%±5.757% ▲

Optimal v Kevin Anderson: +1.4±0.9 per 100 first serves (faults included) over the current mix. Serving T every time would read +6.4 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowEthan winsv KevinMatchupOptimal
Wide41%75%79%80.8%±6.354% ▲
Body9%67%71%74.9%±11.00% ▼
T50%71%76%75.1%±6.846% ▼

Optimal v Kevin Anderson: +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.

Kevin Anderson serving

Deuce court

1st serveNowKevin winsv EthanMatchupOptimal
Wide42%73%72%72.2%±6.955% ▲
Body5%69%62%67.6%±12.70% ▼
T53%81%70%77.4%±6.345% ▼

Optimal v Ethan Quinn: +0.3±0.8 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +2.7 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowKevin winsv EthanMatchupOptimal
Wide41%80%77%83.8%±5.734% ▼
Body6%69%54%61.4%±14.20% ▼
T53%76%74%77.3%±6.466% ▲

Optimal v Ethan Quinn: +0.9±0.7 per 100 first serves (faults included) over the current mix. Serving wide every time would read +4.9 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.

Ethan Quinn returning

1st serve to the forehand

ReturnNowTourOwnv KevinValue
FH slice through the middle46%−4.2−0.3+4.9+0.3±2.3
FH slice crosscourt28%−4.3−1.0−2.1−7.5±2.7
FH through the middle10%+4.3−1.3+1.0+4.0±2.6
FH crosscourt8%+5.5−0.5−0.6+4.3±4.1
FH slice down the line6%−4.3−2.8−0.9−8.0±2.8

Lean FH crosscourt: +6.0±4.0 per 100 returns v the current mix (189 returns charted)

1st serve to the backhand

ReturnNowTourOwnv KevinValue
BH through the middle32%+6.4−2.5±0.0+3.9±2.7
BH crosscourt21%+8.8−1.9−0.6+6.3±3.6
BH down the line21%+4.2−3.2−0.7+0.3±4.6
BH slice through the middle14%−4.2−2.6+2.3−4.5±2.2
BH slice crosscourt9%+0.5−2.7+0.9−1.3±2.8

Lean BH crosscourt: +4.7±3.1 per 100 returns v the current mix (172 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv KevinValue
FH through the middle52%−3.5+0.3±0.0−3.2±2.7
FH crosscourt28%−0.2+1.9+0.5+2.2±4.0
FH slice crosscourt11%−12.5−0.2±0.0−12.7±1.4
FH slice through the middle9%−12.7−0.3±0.0−13.0±1.0

Lean FH crosscourt: +5.8±3.2 per 100 returns v the current mix (54 returns charted)

2nd serve to the backhand

ReturnNowTourOwnv KevinValue
BH through the middle38%−2.9±0.0−1.0−3.8±2.3
BH crosscourt34%+1.0+0.5−1.1+0.4±3.2
BH down the line12%−0.2−5.3−3.5−9.1±4.6
FH through the middle12%−2.9+0.5±0.0−2.4±2.1
FH inside-out5%+1.0+0.8+0.4+2.1±3.1

Lean BH crosscourt: +3.0±2.4 per 100 returns v the current mix (127 returns charted)

Kevin Anderson returning

1st serve to the forehand

ReturnNowTourOwnv EthanValue
FH through the middle41%+4.3−1.2−2.2+0.8±2.8
FH crosscourt29%+5.5−0.2−2.1+3.2±4.2
FH down the line16%+1.7+4.5−6.4−0.3±4.4
FH slice through the middle8%−4.2−1.5−0.6−6.4±2.3
FH slice down the line3%−4.3−0.2−0.8−5.3±2.6

Lean FH crosscourt: +2.7±3.3 per 100 returns v the current mix (469 returns charted, inside the 90% margin)

1st serve to the backhand

ReturnNowTourOwnv EthanValue
BH through the middle42%+6.4−1.2−1.7+3.5±2.6
BH crosscourt19%+8.8−0.2−0.1+8.5±3.5
BH slice through the middle13%−4.2+1.3−3.1−6.1±2.4
BH down the line12%+4.2+1.2−0.4+5.0±4.3
BH slice crosscourt8%+0.5+1.1−4.0−2.4±2.8

Lean BH crosscourt: +6.5±3.1 per 100 returns v the current mix (504 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv EthanValue
FH through the middle52%−3.5−0.3−0.8−4.5±2.9
FH crosscourt29%−0.2−1.8−0.3−2.3±4.2
FH down the line18%−1.8−0.2−0.4−2.4±4.3

Lean FH crosscourt: +1.2±3.4 per 100 returns v the current mix (136 returns charted, inside the 90% margin)

2nd serve to the backhand

ReturnNowTourOwnv EthanValue
BH through the middle44%−2.9+0.9+0.5−1.5±2.5
BH crosscourt40%+1.0+1.7−2.4+0.4±3.2
BH down the line11%−0.2−2.6−0.1−2.9±4.7
BH slice through the middle3%−11.3−1.3±0.0−12.6±1.1
FH through the middle2%−2.9+0.5−0.8−3.1±2.0

Lean BH crosscourt: +1.6±2.3 per 100 returns v the current mix (249 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.

Ethan Quinn

Favour

ShotEdgeOwnTheirs
FH slice to the middle · return+4.3±2.7−0.5+4.7
FH to their backhand · rally+3.3±4.3+0.4+3.0
BH slice to their backhand · rally+2.2±2.4+1.7+0.5
BH to their backhand · return +1+2.1±4.4+0.5+1.7
BH to the middle · rally+1.1±2.6−0.3+1.5
FH to the middle · return+1.1±3.6−0.7+1.8

Avoid

ShotEdgeOwnTheirs
BH to their forehand · return−7.9±5.4−4.5−3.4
BH to the middle · return−4.7±3.3−3.5−1.2
BH to their backhand · return−4.5±4.3−1.2−3.4
BH to their backhand · rally−4.5±3.9−5.4+0.9
BH to the middle · serve +1−2.3±3.0−1.7−0.6

Kevin Anderson

Favour

ShotEdgeOwnTheirs
FH to their forehand · serve +1+1.0±5.4−1.6+2.6
FH to the middle · rally−1.7±3.2−2.5+0.8
BH to the middle · return−1.8±3.3−0.8−1.0
FH to the middle · serve +1−2.4±3.1−1.4−0.9
BH to the middle · rally−2.4±3.0+0.2−2.6
FH to the middle · return−2.8±3.5−0.6−2.2

Avoid

ShotEdgeOwnTheirs
FH to their backhand · serve +1−6.5±4.8−2.2−4.2
FH to their forehand · rally−6.1±4.9−4.7−1.4
BH to their backhand · rally−6.0±3.7−4.6−1.4
FH to their backhand · rally−5.0±4.5−4.4−0.7
BH to their backhand · return−4.3±4.1+1.1−5.4

Against Kevin Anderson-like opponents

Ethan Quinn vMatchesServe pts wonReturn pts won
All charted opponents–63.9%36.8%

Similar by tactical fingerprint: Zhizhen Zhang, Felix Auger Aliassime, Alexei Popyrin, Zizou Bergs, Borna Coric, Nick Kyrgios, Sam Querrey, Tomas Berdych, Andy Roddick. When two players have rarely met, their records against these lookalikes fill the gap.