RallyIQ

Game plan

Angelique Kerber v Sorana Cirstea

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

Forecast

Angelique Kerber wins, best of 3 72%90%: 41%–92% · best of 5: 77%
Serve points won 58.6% / 54.1% Angelique / Sorana · tour 58.1%
Strengths only, no similarity priors 79%serve 60.0% / 53.8%

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 At least one of them is no longer active or has too little charted in the last three seasons, so both are compared on their careers.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 Angelique Kerber's record against Sorana Cirstea's tactical lookalikes and in their charted head-to-heads (lookalikes: −4.5 on serve, −1.0 on return vs expectation (1385 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

CareerAngeliqueSorana
Direction choice+0.18 ±0.05
better than 83%
+0.03 ±0.08
better than 59%
Shot selection+0.05 ±0.08
better than 50%
+0.24 ±0.14
better than 71%
Execution+1.65 ±0.29
better than 97%
−0.19 ±0.44
better than 51%
Points left on the table2.57 ±0.07
lower than 56%
2.62 ±0.13
lower than 49%

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.

Structural compatibility

Expected edge per 100 rally shots from style alone: Angelique Kerber +2.33, Sorana Cirstea +1.17. Each player's shot mix weighted by their own skill with each shot and by how much the other gives up against it. This is why some rankings gaps don't hold in a given matchup.

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.

Angelique Kerber serving

Deuce court

1st serveNowAngelique winsv SoranaMatchupOptimal
Wide36%65%66%65.5%±4.951% ▲
Body27%56%53%51.0%±6.512% ▼
T37%59%69%60.6%±5.637%

Optimal v Sorana Cirstea: +0.8±0.8 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +5.7 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowAngelique winsv SoranaMatchupOptimal
Wide62%62%65%61.3%±4.863%
Body19%54%64%62.2%±7.64% ▼
T18%71%64%70.7%±6.133% ▲

Optimal v Sorana Cirstea: +0.5±0.9 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +7.5 per 100 first serves in before the returner adjusts.

Sorana Cirstea serving

Deuce court

1st serveNowSorana winsv AngeliqueMatchupOptimal
Wide45%68%69%70.9%±4.360% ▲
Body17%55%59%57.1%±7.017%
T37%69%63%64.9%±5.423% ▼

Optimal v Angelique Kerber: +0.6±0.7 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.

Ad court

1st serveNowSorana winsv AngeliqueMatchupOptimal
Wide47%66%67%67.5%±5.362% ▲
Body18%48%58%49.6%±7.33% ▼
T35%61%60%56.1%±5.535%

Optimal v Angelique Kerber: +0.6±0.9 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +7.3 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.

Angelique Kerber returning

1st serve to the forehand

ReturnNowTourOwnv SoranaValue
FH through the middle53%+4.2+2.6−1.4+5.4±2.0
FH crosscourt34%+5.3+5.1−0.2+10.2±3.5
FH down the line11%+1.5+5.5+5.0+12.0±4.4
FH slice through the middle1%−6.7−0.1+1.9−4.9±2.2
BH through the middle1%+5.2+1.3−1.1+5.5±2.0

Lean FH down the line: +4.4±4.2 per 100 returns v the current mix (1007 returns charted)

1st serve to the backhand

ReturnNowTourOwnv SoranaValue
BH through the middle48%+6.0+1.1−1.1+6.1±1.8
BH crosscourt30%+7.7−0.4−0.1+7.3±2.9
BH down the line12%+2.2+7.3−1.0+8.5±4.0
BH slice through the middle5%−6.2−0.7+1.9−5.0±2.5
BH slice crosscourt2%−4.2−0.4−0.3−4.9±2.9

Lean BH down the line: +2.8±3.8 per 100 returns v the current mix (1499 returns charted, inside the 90% margin)

2nd serve to the forehand

ReturnNowTourOwnv SoranaValue
FH crosscourt39%+0.5−1.4+0.8−0.1±4.2
FH down the line32%−0.6+1.3+1.2+2.0±4.9
FH through the middle28%−3.2+0.3−1.4−4.3±2.8

Lean FH down the line: +2.6±3.8 per 100 returns v the current mix (285 returns charted, inside the 90% margin)

2nd serve to the backhand

ReturnNowTourOwnv SoranaValue
BH crosscourt39%+1.5+2.8+0.9+5.2±3.1
BH through the middle37%−2.6+1.3+1.6+0.3±2.2
BH down the line20%−0.5+4.0−2.2+1.2±4.5
FH inside-in1%+0.7−0.9+0.8+0.6±4.0
FH through the middle1%−2.7+1.2−1.4−2.9±2.1

Lean BH crosscourt: +2.8±2.2 per 100 returns v the current mix (646 returns charted)

Sorana Cirstea returning

1st serve to the forehand

ReturnNowTourOwnv AngeliqueValue
FH through the middle41%+4.2−1.1+1.1+4.2±2.0
FH down the line25%+1.5−0.7−0.6+0.3±3.9
FH crosscourt15%+5.3+2.9+3.8+12.0±3.7
FH slice through the middle11%−6.7−1.5−1.0−9.2±2.6
FH slice crosscourt4%−6.6+0.4+1.0−5.3±2.6

Lean FH crosscourt: +10.1±3.4 per 100 returns v the current mix (612 returns charted)

1st serve to the backhand

ReturnNowTourOwnv AngeliqueValue
BH through the middle47%+6.0+0.7+1.3+8.0±1.8
BH crosscourt31%+7.7+0.6+6.5+14.9±2.7
BH down the line14%+2.2−1.3−1.7−0.8±3.9
BH slice crosscourt3%−4.2−0.2+2.1−2.3±2.9
BH slice through the middle3%−6.2+0.7+0.6−5.0±2.3

Lean BH crosscourt: +7.2±2.1 per 100 returns v the current mix (534 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv AngeliqueValue
FH through the middle44%−3.2+0.7+2.0−0.4±2.8
FH crosscourt30%+0.5−2.1+2.0+0.4±4.3
FH down the line23%−0.6−0.9+2.4+1.0±5.1
FH slice through the middle3%−15.2−0.9±0.0−16.1±1.1

Lean FH down the line: +1.3±4.4 per 100 returns v the current mix (189 returns charted, inside the 90% margin)

2nd serve to the backhand

ReturnNowTourOwnv AngeliqueValue
BH crosscourt48%+1.5−0.3+3.7+4.9±2.9
BH through the middle42%−2.6+0.9−0.1−1.8±2.1
BH down the line10%−0.5−2.4+0.4−2.5±4.4

Lean BH crosscourt: +3.6±1.8 per 100 returns v the current mix (271 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.

Angelique Kerber

Favour

ShotEdgeOwnTheirs
FH to their backhand · return+9.2±5.3+6.0+3.2
BH to their forehand · return +1+8.1±5.7+3.8+4.3
BH to their forehand · return+6.7±5.3+8.1−1.5
FH to their backhand · return +1+6.4±4.9+5.7+0.7
FH to their backhand · rally+5.8±4.2+2.7+3.1
FH to their forehand · return +1+5.3±5.1+4.7+0.7

Avoid

ShotEdgeOwnTheirs
BH to the middle · serve +1−4.0±3.2+2.3−6.3
BH slice to their backhand · rally−1.6±4.0−3.4+1.8
FH to the middle · return−0.7±3.4+2.4−3.1
BH to the middle · rally−0.4±2.8+1.4−1.8
FH slice to the middle · rally+1.3±3.8−2.0+3.4

Sorana Cirstea

Favour

ShotEdgeOwnTheirs
BH to their forehand · serve +1+6.4±5.5+0.5+5.9
FH to their backhand · return +1+4.5±5.2+0.9+3.7
FH to the middle · serve +1+3.7±3.5+1.7+2.0
FH to their backhand · serve +1+3.2±4.9−2.1+5.3
BH to their forehand · return +1+3.1±5.7−1.4+4.6
FH to the middle · rally+2.6±3.1+1.1+1.4

Avoid

ShotEdgeOwnTheirs
BH to their backhand · rally−5.8±3.9−4.6−1.2
BH to their backhand · return +1−5.7±4.9−0.1−5.5
BH to the middle · return +1−3.6±3.4−1.1−2.5
FH to their forehand · return +1−2.3±5.1−0.8−1.5
FH to their forehand · serve +1−2.0±4.7−3.6+1.7

Against Sorana Cirstea-like opponents

Angelique Kerber vMatchesServe pts wonReturn pts won
All charted opponents–56.1%42.6%
Players most similar to Sorana Cirstea10 51.7%40.9%

Similar by tactical fingerprint: Anastasia Potapova, Karolina Pliskova, Iga Swiatek, Belinda Bencic, Ekaterina Alexandrova, Victoria Mboko, Victoria Azarenka, Veronika Kudermetova, Mona Barthel, Daniela Hantuchova. When two players have rarely met, their records against these lookalikes fill the gap.