RallyIQ

Game plan

Aryna Sabalenka v Iga Swiatek

Every number combines what Aryna Sabalenka does well with what Iga Swiatek allows, each measured against the tour average and shrunk toward it when the sample is thin. Flip perspective

Forecast

Aryna Sabalenka wins, best of 3 26%90%: 9%–52% · best of 5: 21%
Serve points won 56.0% / 61.0% Aryna / Iga · tour 56.4%
Strengths only, no similarity priors 32%serve 57.1% / 60.6%

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. Both were charted enough in the last three seasons, so those carry the most weight. The result is then nudged by Aryna Sabalenka's record against Iga Swiatek's tactical lookalikes and in their charted head-to-heads (lookalikes: −1.9 on serve, −0.3 on return vs expectation (779 points); head-to-head: −10.9 on serve, −5.0 on return vs expectation (204 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

CareerArynaIga
Direction choice+0.36 ±0.05
better than 97%
+0.17 ±0.03
better than 82%
Shot selection+0.04 ±0.10
better than 49%
+0.32 ±0.04
better than 81%
Execution−0.05 ±0.37
better than 59%
+0.91 ±0.19
better than 89%
Points left on the table2.23 ±0.08
lower than 92%
2.13 ±0.04
lower than 96%

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: Aryna Sabalenka −1.38, Iga Swiatek +0.37. 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.

Aryna Sabalenka serving

Deuce court

1st serveNowAryna winsv IgaMatchupOptimal
Wide51%71%60%65.6%±3.466% ▲
Body18%56%51%49.9%±5.53% ▼
T31%72%61%65.2%±4.631%

Optimal v Iga Swiatek: +1.4±0.7 per 100 first serves (faults included) over the current mix. Serving wide every time would read +3.0 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowAryna winsv IgaMatchupOptimal
Wide56%68%62%63.9%±3.754% ▼
Body12%50%51%44.7%±6.30% ▼
T31%71%59%66.6%±4.546% ▲

Optimal v Iga Swiatek: +0.9±0.7 per 100 first serves (faults included) over the current mix. Serving T every time would read +4.2 per 100 first serves in before the returner adjusts.

Iga Swiatek serving

Deuce court

1st serveNowIga winsv ArynaMatchupOptimal
Wide40%69%66%69.6%±3.453% ▲
Body28%64%62%68.2%±4.524% ▼
T32%73%74%77.8%±3.823% ▼

Optimal v Aryna Sabalenka: +0.1±0.5 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +6.0 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowIga winsv ArynaMatchupOptimal
Wide38%72%66%72.0%±3.549% ▲
Body29%63%55%61.3%±5.214% ▼
T33%68%65%68.4%±4.137% ▲

Optimal v Aryna Sabalenka: +0.9±0.6 per 100 first serves (faults included) over the current mix. Serving wide every time would read +4.2 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.

Aryna Sabalenka returning

1st serve to the forehand

ReturnNowTourOwnv IgaValue
FH through the middle35%+4.2−0.8−1.2+2.2±1.7
FH crosscourt35%+5.3+1.0−0.6+5.7±2.6
FH slice through the middle13%−6.7+1.2−0.9−6.4±2.1
FH down the line9%+1.5−2.1−3.6−4.1±3.6
FH slice crosscourt6%−6.6+0.4−0.3−6.5±2.6

Lean FH crosscourt: +4.8±1.8 per 100 returns v the current mix (863 returns charted)

1st serve to the backhand

ReturnNowTourOwnv IgaValue
BH through the middle39%+6.0−0.8−1.3+3.8±1.7
BH crosscourt29%+7.7+2.7−1.2+9.3±2.4
BH slice through the middle12%−6.2−1.0−0.8−8.0±2.3
BH slice crosscourt9%−4.2−1.4−5.0−10.6±3.0
BH down the line8%+2.2−4.5−2.7−5.0±3.7

Lean BH crosscourt: +8.0±1.9 per 100 returns v the current mix (698 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv IgaValue
FH crosscourt48%+0.5+1.4−2.3−0.4±3.5
FH through the middle31%−3.2−1.9−0.4−5.5±2.4
FH down the line18%−0.6−2.2−0.2−3.0±4.5
FH slice crosscourt3%−14.9+0.1+0.1−14.7±2.0

Lean FH crosscourt: +2.5±2.1 per 100 returns v the current mix (245 returns charted)

2nd serve to the backhand

ReturnNowTourOwnv IgaValue
BH crosscourt50%+1.5+0.3−0.9+0.9±2.3
BH through the middle32%−2.6+0.2±0.0−2.4±1.9
BH down the line10%−0.5−5.6−0.8−6.9±4.2
FH inside-out3%+1.4+1.0−0.2+2.2±3.2
FH inside-in3%+0.7+1.0−2.3−0.6±3.3

Lean BH crosscourt: +1.9±1.4 per 100 returns v the current mix (387 returns charted)

Iga Swiatek returning

1st serve to the forehand

ReturnNowTourOwnv ArynaValue
FH through the middle51%+4.2+0.8−1.2+3.7±1.5
FH crosscourt25%+5.3+0.1−2.1+3.3±2.8
FH down the line15%+1.5−2.7−3.4−4.5±3.4
FH slice through the middle6%−6.7−0.5−0.4−7.6±2.1
FH slice crosscourt3%−6.6−3.5+1.5−8.6±2.7

Lean FH through the middle: +2.5±1.2 per 100 returns v the current mix (3485 returns charted)

1st serve to the backhand

ReturnNowTourOwnv ArynaValue
BH through the middle50%+6.0+0.4±0.0+6.4±1.4
BH crosscourt32%+7.7+0.7+0.6+8.9±2.2
BH down the line10%+2.2+2.9−0.1+5.0±3.7
BH slice through the middle4%−6.2−0.6−1.1−7.9±2.4
BH slice crosscourt3%−4.2−3.2−1.6−9.0±3.0

Lean BH crosscourt: +3.3±1.7 per 100 returns v the current mix (3016 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv ArynaValue
FH through the middle41%−3.2+1.2−0.7−2.7±2.2
FH crosscourt40%+0.5−0.6−2.9−3.0±3.5
FH down the line17%−0.6−1.4−1.7−3.7±4.8
FH slice through the middle1%−15.2±0.0−0.2−15.5±2.2
FH slice crosscourt1%−14.9−0.1−1.3−16.2±2.0

Lean FH through the middle: +0.6±2.0 per 100 returns v the current mix (1030 returns charted, inside the 90% margin)

2nd serve to the backhand

ReturnNowTourOwnv ArynaValue
BH crosscourt47%+1.5+1.2−1.6+1.1±2.2
BH through the middle33%−2.6+0.2−1.0−3.4±1.7
BH down the line19%−0.5+4.4+1.4+5.3±4.2
FH inside-in1%+0.7−3.3−2.9−5.5±4.0
FH through the middle0%−2.7−1.1−0.7−4.5±1.9

Lean BH down the line: +5.0±3.6 per 100 returns v the current mix (1717 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.

Aryna Sabalenka

Favour

ShotEdgeOwnTheirs
FH to their forehand · return+1.4±2.2+2.3−0.9
FH to their forehand · rally+1.0±1.5+2.2−1.2
FH slice to the middle · rally+0.8±2.3+0.4+0.4
FH to the middle · return +1+0.6±1.9+0.8−0.2
BH to their forehand · return +1+0.5±3.5+1.6−1.1
FH slice to their forehand · return+0.4±2.6+0.4±0.0

Avoid

ShotEdgeOwnTheirs
BH slice to their forehand · rally−9.5±3.2−6.1−3.5
BH slice to their backhand · return−7.9±3.0−3.0−4.9
BH to their forehand · return−6.6±2.9−4.7−1.9
FH to their backhand · return−6.0±2.9−3.6−2.4
FH to the middle · return−2.8±1.4−2.4−0.5

Iga Swiatek

Favour

ShotEdgeOwnTheirs
BH to their forehand · return +1+6.5±3.4+4.1+2.4
BH to their forehand · rally+4.7±2.6+3.0+1.8
BH to their backhand · return +1+3.8±2.2+0.5+3.3
BH to their forehand · return+3.5±2.7+2.9+0.7
FH to their forehand · return +1+2.7±2.4+1.0+1.7
FH to the middle · serve +1+1.5±1.5±0.0+1.5

Avoid

ShotEdgeOwnTheirs
BH slice to their forehand · rally−5.4±3.6−4.7−0.7
FH to their backhand · return−4.2±2.7−1.1−3.1
BH to the middle · return +1−3.1±1.6−0.4−2.6
FH to their forehand · return−3.0±2.4−0.4−2.6
BH slice to the middle · return−3.0±2.4−1.0−1.9

Against Iga Swiatek-like opponents

Aryna Sabalenka vMatchesServe pts wonReturn pts won
All charted opponents–61.0%43.4%
Players most similar to Iga Swiatek6 58.1%43.6%
Iga Swiatek (charted head-to-head)2 44.3%33.7%

Similar by tactical fingerprint: Anastasia Potapova, Karolina Pliskova, Anna Kalinskaya, Anna Blinkova, Ekaterina Alexandrova, Sorana Cirstea, Shuai Zhang, Varvara Gracheva, Anett Kontaveit, Eugenie Bouchard. When two players have rarely met, their records against these lookalikes fill the gap.

Charted head-to-head