RallyIQ

Game plan

R v Angelique Kerber

Every number combines what R does well with what Angelique Kerber allows, each measured against the tour average and shrunk toward it when the sample is thin. Flip perspective

Forecast

R wins, best of 3 29%90%: 5%–70% · best of 5: 24%
Serve points won 53.4% / 57.6% R / Angelique · tour 55.0%
Strengths only, no similarity priors 29%serve 53.4% / 57.6%

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 At least one of them is no longer active or has too little charted in the last three seasons, so both are compared on their careers.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

CareerRAngelique
Direction choice+0.09 ±0.26
better than 71%
+0.18 ±0.05
better than 83%
Shot selection+0.24 ±0.21
better than 72%
+0.05 ±0.08
better than 50%
Execution−6.35 ±0.39
better than 0%
+1.65 ±0.29
better than 97%
Points left on the table2.35 ±0.12
lower than 82%
2.57 ±0.07
lower than 56%

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.

R serving

Deuce court

1st serveNowR winsv AngeliqueMatchupOptimal
Wide42%74%69%76.7%±5.657% ▲
Body24%53%59%55.0%±8.39% ▼
T34%75%63%71.4%±7.534%

Optimal v Angelique Kerber: +1.1±0.9 per 100 first serves (faults included) over the current mix. Serving wide every time would read +6.9 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowR winsv AngeliqueMatchupOptimal
Wide33%67%67%69.1%±7.748% ▲
Body24%51%58%52.4%±8.821% ▼
T43%59%60%54.4%±7.331% ▼

Optimal v Angelique Kerber: +1.0±0.8 per 100 first serves (faults included) over the current mix. Serving wide every time would read +10.3 per 100 first serves in before the returner adjusts.

Angelique Kerber serving

Deuce court

1st serveNowAngelique winsv RMatchupOptimal
Wide36%65%74%73.6%±6.251% ▲
Body27%56%53%51.1%±8.112% ▼
T37%59%75%67.6%±7.937%

Optimal v R: +1.1±0.9 per 100 first serves (faults included) over the current mix. Serving wide every time would read +8.3 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowAngelique winsv RMatchupOptimal
Wide62%62%67%63.6%±7.977% ▲
Body19%54%51%48.5%±8.84% ▼
T18%71%59%66.1%±7.819%

Optimal v R: +1.3±1.0 per 100 first serves (faults included) over the current mix. Serving T every time would read +5.0 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.

R returning

1st serve to the forehand

ReturnNowTourOwnv AngeliqueValue
FH through the middle39%+4.2−18.3+1.1−13.0±2.4
FH crosscourt20%+5.3−20.2+3.8−11.2±3.8
FH down the line17%+1.5−15.0−0.6−14.1±4.2
FH slice through the middle13%−6.7−3.2−1.0−11.0±2.5
FH slice crosscourt7%−6.6−4.7+1.0−10.4±2.6

Lean FH slice crosscourt: +2.0±2.8 per 100 returns v the current mix (242 returns charted, inside the 90% margin)

1st serve to the backhand

ReturnNowTourOwnv AngeliqueValue
BH through the middle47%+6.0−17.8+1.3−10.5±2.2
BH crosscourt33%+7.7−13.7+6.5+0.5±3.0
BH down the line10%+2.2−11.3−1.7−10.8±3.5
BH slice crosscourt5%−4.2−3.6+2.1−5.6±2.6
BH slice through the middle5%−6.2+0.6+0.6−5.1±2.1

Lean BH crosscourt: +6.9±2.3 per 100 returns v the current mix (146 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv AngeliqueValue
FH crosscourt41%+0.5−12.4+2.0−9.9±4.3
FH through the middle38%−3.2−8.4+2.0−9.5±2.8
FH down the line21%−0.6−6.8+2.4−4.9±4.8

Lean FH down the line: +3.8±4.3 per 100 returns v the current mix (82 returns charted, inside the 90% margin)

2nd serve to the backhand

ReturnNowTourOwnv AngeliqueValue
BH through the middle45%−2.6−1.4−0.1−4.1±2.2
BH crosscourt44%+1.5−2.4+3.7+2.8±3.0
BH down the line11%−0.5−0.4+0.4−0.6±3.5

Lean BH crosscourt: +3.5±2.0 per 100 returns v the current mix (55 returns charted)

Angelique Kerber returning

1st serve to the forehand

ReturnNowTourOwnv RValue
FH through the middle53%+4.2+2.6−17.1−10.3±2.4
FH crosscourt34%+5.3+5.1−14.4−3.9±3.7
FH down the line11%+1.5+5.5−19.3−12.2±4.6
FH slice through the middle1%−6.7−0.1−0.7−7.5±2.3
BH through the middle1%+5.2+1.3−14.2−7.6±2.3

Lean FH crosscourt: +4.4±2.8 per 100 returns v the current mix (1007 returns charted)

1st serve to the backhand

ReturnNowTourOwnv RValue
BH through the middle48%+6.0+1.1−14.2−7.0±2.2
BH crosscourt30%+7.7−0.4−12.7−5.4±3.0
BH down the line12%+2.2+7.3−12.2−2.7±4.3
BH slice through the middle5%−6.2−0.7+0.8−6.1±2.2
BH slice crosscourt2%−4.2−0.4−0.9−5.5±2.4

Lean BH down the line: +3.4±4.0 per 100 returns v the current mix (1499 returns charted, inside the 90% margin)

2nd serve to the forehand

ReturnNowTourOwnv RValue
FH crosscourt39%+0.5−1.4−8.0−8.8±4.3
FH down the line32%−0.6+1.3−12.3−11.5±5.1
FH through the middle28%−3.2+0.3−7.6−10.5±3.0

Lean FH crosscourt: +1.3±3.2 per 100 returns v the current mix (285 returns charted, inside the 90% margin)

2nd serve to the backhand

ReturnNowTourOwnv RValue
BH crosscourt39%+1.5+2.8−1.1+3.1±3.1
BH through the middle37%−2.6+1.3−4.6−6.0±2.5
BH down the line20%−0.5+4.0−3.6−0.2±5.0
FH inside-in1%+0.7−0.9−8.0−8.2±4.1
FH through the middle1%−2.7+1.2−7.6−9.1±2.3

Lean BH crosscourt: +4.4±2.3 per 100 returns v the current mix (646 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.

R

Favour

ShotEdgeOwnTheirs
FH to their backhand · serve +1+5.0±3.8+2.7+2.3
BH to their backhand · serve +1+5.0±3.7+4.5+0.4
BH to the middle · rally+1.7±2.1+0.1+1.6
FH to the middle · rally+1.5±2.3−0.8+2.2
FH to the middle · serve +1−0.2±2.8−1.7+1.4
FH to the middle · return +1−0.2±2.9−0.5+0.3

Avoid

ShotEdgeOwnTheirs
FH to their forehand · return−19.4±4.7−20.7+1.2
FH to the middle · return−13.3±2.5−16.1+2.8
FH to their backhand · return−12.7±4.4−15.7+3.0
BH to their backhand · return−10.5±3.4−10.5−0.1
BH to the middle · return−10.0±2.1−12.3+2.3

Angelique Kerber

Favour

ShotEdgeOwnTheirs
BH to their backhand · serve +1+6.6±3.7+2.1+4.5
FH to their backhand · serve +1+4.1±3.9+1.4+2.7
FH to the middle · rally+1.9±2.3+2.6−0.8
BH to the middle · rally+1.2±2.2+1.1+0.1
FH to the middle · return +1+1.2±3.0+1.7−0.5
BH to the middle · serve +1+1.1±2.6+3.4−2.3

Avoid

ShotEdgeOwnTheirs
FH to their forehand · return−19.6±4.3+1.1−20.7
FH to the middle · return−14.4±2.5+1.7−16.1
FH to their backhand · return−10.9±4.0+4.8−15.7
BH to the middle · return−10.5±2.3+1.7−12.3
BH to their backhand · return +1−9.2±3.9−1.6−7.6

Against Angelique Kerber-like opponents

R vMatchesServe pts wonReturn pts won
All charted opponents–58.7%41.3%

Similar by tactical fingerprint: Cristina Bucsa, Arantxa Rus, Leylah Fernandez, Magda Linette, Sara Bejlek, Olga Danilovic, Anhelina Kalinina, Brenda Fruhvirtova, Anna Lena Friedsam, Flavia Pennetta. When two players have rarely met, their records against these lookalikes fill the gap.