RallyIQ

Game plan

Saisai Zheng v Sara Sorribes Tormo

Every number combines what Saisai Zheng does well with what Sara Sorribes Tormo allows, each measured against the tour average and shrunk toward it when the sample is thin. Flip perspective

Forecast

Saisai Zheng wins, best of 3 57%90%: 15%–92% · best of 5: 58%
Serve points won 54.7% / 53.4% Saisai / Sara · tour 58.1%
Strengths only, no similarity priors 57%serve 54.7% / 53.4%

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 At least one of them is no longer active or has too little charted in the last three seasons, so both are compared on their careers.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

CareerSaisaiSara
Direction choice−0.36 ±0.16
better than 3%
−0.48 ±0.10
better than 0%
Shot selection−0.40 ±0.15
better than 17%
−0.84 ±0.19
better than 5%
Execution−0.20 ±0.75
better than 48%
+2.10 ±0.36
better than 99%
Points left on the table3.22 ±0.21
lower than 4%
3.12 ±0.13
lower than 7%

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.

Saisai Zheng serving

Deuce court

1st serveNowSaisai winsv SaraMatchupOptimal
Wide43%62%62%58.1%±8.843%
Body23%63%51%56.2%±10.18% ▼
T34%67%60%59.8%±9.849% ▲

Optimal v Sara Sorribes Tormo: +0.9±1.1 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +1.6 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowSaisai winsv SaraMatchupOptimal
Wide49%58%60%52.8%±9.154% ▲
Body18%59%55%57.1%±11.128% ▲
T33%66%57%58.1%±10.618% ▼

Optimal v Sara Sorribes Tormo: +0.1±1.0 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +2.8 per 100 first serves in before the returner adjusts.

Sara Sorribes Tormo serving

Deuce court

1st serveNowSara winsv SaisaiMatchupOptimal
Wide44%61%65%59.4%±8.359% ▲
Body41%51%51%45.1%±10.826% ▼
T15%59%68%59.3%±10.815%

Optimal v Saisai Zheng: +1.0±1.1 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +5.9 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowSara winsv SaisaiMatchupOptimal
Wide24%58%65%56.8%±9.540% ▲
Body52%53%63%60.7%±11.537% ▼
T24%54%65%54.8%±9.823%

Optimal v Saisai Zheng: +0.6±1.1 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving body every time would read +2.3 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.

Saisai Zheng returning

1st serve to the forehand

ReturnNowTourOwnv SaraValue
FH through the middle47%+4.2+1.1+1.5+6.8±2.5
FH slice through the middle19%−6.7+1.6+0.9−4.2±2.4
FH down the line17%+1.5+2.3+2.4+6.3±4.1
FH crosscourt7%+5.3+0.2+3.5+9.0±3.5
FH slice down the line5%−10.5−0.5±0.0−11.0±1.7

Lean FH through the middle: +3.6±1.6 per 100 returns v the current mix (169 returns charted)

1st serve to the backhand

ReturnNowTourOwnv SaraValue
BH through the middle44%+6.0+1.0+1.6+8.6±2.5
BH down the line23%+2.2+1.9−0.6+3.6±4.5
BH crosscourt18%+7.7+0.9+0.5+9.1±3.1
BH slice through the middle9%−6.2+0.7−0.1−5.7±2.1
BH slice crosscourt7%−4.2+0.4+0.1−3.7±2.5

Lean BH crosscourt: +3.7±3.0 per 100 returns v the current mix (131 returns charted)

2nd serve to the backhand

ReturnNowTourOwnv SaraValue
BH through the middle48%−2.6−0.7+1.6−1.7±2.8
BH crosscourt32%+1.5−0.6+1.0+1.8±3.6
BH down the line19%−0.5−0.5+1.6+0.5±4.9

Lean BH crosscourt: +1.9±2.9 per 100 returns v the current mix (77 returns charted, inside the 90% margin)

Sara Sorribes Tormo returning

1st serve to the forehand

ReturnNowTourOwnv SaisaiValue
FH through the middle55%+4.2+3.8−1.4+6.5±2.7
FH down the line19%+1.5+2.0−2.0+1.6±4.4
FH crosscourt14%+5.3+3.1−0.6+7.9±4.3
FH slice through the middle8%−6.7+0.1+0.7−5.9±2.1
FH slice crosscourt4%−6.6+0.1±0.0−6.6±1.8

Lean FH crosscourt: +3.7±4.1 per 100 returns v the current mix (518 returns charted, inside the 90% margin)

1st serve to the backhand

ReturnNowTourOwnv SaisaiValue
BH through the middle49%+6.0+2.4−0.4+8.1±2.5
BH crosscourt22%+7.7+4.0+0.5+12.3±3.5
BH down the line12%+2.2+3.2−4.0+1.4±4.7
BH slice through the middle8%−6.2+1.9−0.1−4.4±2.3
BH slice crosscourt3%−4.2−0.8+1.0−3.9±2.2

Lean BH crosscourt: +6.0±3.1 per 100 returns v the current mix (530 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv SaisaiValue
FH through the middle50%−3.2+1.6+0.5−1.0±3.1
FH crosscourt27%+0.5±0.0+0.1+0.6±4.4
FH down the line23%−0.6+1.9±0.0+1.3±4.7

Lean FH down the line: +1.3±4.1 per 100 returns v the current mix (113 returns charted, inside the 90% margin)

2nd serve to the backhand

ReturnNowTourOwnv SaisaiValue
FH inside-out34%+1.4+0.7±0.0+2.0±3.9
FH through the middle31%−2.7+2.4+0.5+0.2±2.6
BH through the middle18%−2.6+1.7+2.9+2.0±2.8
BH crosscourt8%+1.5−0.1+0.7+2.1±3.5
BH down the line3%−0.5−1.9+1.2−1.3±3.9

Lean BH crosscourt: +1.1±3.6 per 100 returns v the current mix (261 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 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.

Saisai Zheng

Favour

ShotEdgeOwnTheirs
BH to their backhand · rally+7.0±4.2+2.2+4.9
BH to their backhand · serve +1+5.7±5.0+1.0+4.7
BH to their forehand · rally+5.6±4.8+0.3+5.2
BH to the middle · return+4.5±3.1+0.2+4.3
FH to the middle · return+4.0±3.3+1.5+2.5
BH to their forehand · return+3.4±6.3−0.9+4.4

Avoid

ShotEdgeOwnTheirs
BH slice to their backhand · rally−5.4±3.9−0.5−4.9
BH slice to the middle · rally−2.8±2.8−1.1−1.7
FH to their backhand · serve +1−0.3±5.7−2.0+1.7
FH to their forehand · rally−0.1±3.7−0.1±0.0
FH to the middle · serve +1+0.8±3.0+0.9−0.1

Sara Sorribes Tormo

Favour

ShotEdgeOwnTheirs
BH to their backhand · return+8.6±4.9+6.2+2.4
FH to their forehand · serve +1+8.4±5.5+5.1+3.2
BH to the middle · return+6.2±3.5+4.4+1.8
BH to their backhand · rally+4.7±4.4+5.1−0.4
BH to the middle · return +1+4.5±3.0+3.2+1.4
FH to the middle · rally+4.4±2.7+3.7+0.7

Avoid

ShotEdgeOwnTheirs
FH to their backhand · rally+0.8±4.9+4.6−3.8
BH slice to the middle · rally+0.9±2.4+3.3−2.4
BH to their backhand · return +1+1.0±3.6+0.9+0.1
BH to the middle · rally+2.3±2.6+2.5−0.2
BH to their forehand · rally+2.5±5.3+5.2−2.8

Against Sara Sorribes Tormo-like opponents

Saisai Zheng vMatchesServe pts wonReturn pts won
All charted opponents–56.6%41.9%

Similar by tactical fingerprint: Tamara Zidansek, Marie Bouzkova, Viktorija Golubic, Daria Kasatkina, Katie Volynets, Sara Errani, Alize Cornet, Madison Brengle, Jennifer Capriati. When two players have rarely met, their records against these lookalikes fill the gap.