RallyIQ

Game plan

Su Wei Hsieh v Belinda Bencic

Every number combines what Su Wei Hsieh does well with what Belinda Bencic allows, each measured against the tour average and shrunk toward it when the sample is thin. Flip perspective

Forecast

Su Wei Hsieh wins, best of 3 11%90%: 2%–35% · best of 5: 6%
Serve points won 56.8% / 66.5% Su / Belinda · tour 58.1%
Strengths only, no similarity priors 11%serve 56.6% / 66.4%

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 At least one of them is no longer active or has too little charted in the last three seasons, so both are compared on their careers.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 Su Wei Hsieh's record against Belinda Bencic's tactical lookalikes and in their charted head-to-heads (lookalikes: +2.4 on serve, −1.2 on return vs expectation (359 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

CareerSuBelinda
Direction choice+0.33 ±0.09
better than 96%
+0.11 ±0.04
better than 74%
Shot selection−0.59 ±0.14
better than 9%
+0.12 ±0.07
better than 58%
Execution+0.24 ±0.61
better than 70%
+0.91 ±0.34
better than 89%
Points left on the table2.26 ±0.15
lower than 89%
2.41 ±0.06
lower than 75%

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: Su Wei Hsieh +0.87, Belinda Bencic +1.40. 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.

Su Wei Hsieh serving

Deuce court

1st serveNowSu winsv BelindaMatchupOptimal
Wide48%66%67%67.4%±4.963% ▲
Body20%54%55%52.3%±7.45% ▼
T32%60%72%65.1%±6.332%

Optimal v Belinda Bencic: +1.1±0.9 per 100 first serves (faults included) over the current mix. Serving wide every time would read +3.8 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowSu winsv BelindaMatchupOptimal
Wide45%66%69%69.9%±5.560% ▲
Body20%60%53%56.8%±7.75% ▼
T35%61%67%63.7%±6.135%

Optimal v Belinda Bencic: +0.7±0.9 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +4.8 per 100 first serves in before the returner adjusts.

Belinda Bencic serving

Deuce court

1st serveNowBelinda winsv SuMatchupOptimal
Wide50%66%66%65.9%±5.250%
Body18%65%49%57.2%±8.13% ▼
T32%71%72%75.0%±5.347% ▲

Optimal v Su Wei Hsieh: +0.8±0.9 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +7.7 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowBelinda winsv SuMatchupOptimal
Wide42%70%66%70.3%±5.639% ▼
Body14%63%59%65.9%±7.82% ▼
T44%69%68%71.8%±5.359% ▲

Optimal v Su Wei Hsieh: +0.6±0.9 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +1.5 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.

Su Wei Hsieh returning

1st serve to the forehand

ReturnNowTourOwnv BelindaValue
FH slice through the middle27%−6.7+0.5−0.9−7.1±2.3
FH crosscourt23%+5.3+4.5+1.7+11.4±3.6
FH through the middle22%+4.2+0.1+1.2+5.5±2.4
FH slice crosscourt18%−6.6−1.1−0.5−8.2±2.8
FH down the line5%+1.5+2.1−4.7−1.0±3.9

Lean FH crosscourt: +11.9±2.9 per 100 returns v the current mix (386 returns charted)

1st serve to the backhand

ReturnNowTourOwnv BelindaValue
BH through the middle47%+6.0+2.9−0.8+8.2±2.1
BH crosscourt35%+7.7+0.9−2.5+6.1±3.1
BH down the line9%+2.2+2.4−2.4+2.2±4.2
BH slice down the line3%−12.5−1.5−3.8−17.8±3.2
BH slice through the middle3%−6.2−0.9−0.5−7.7±2.2

Lean BH through the middle: +3.1±1.6 per 100 returns v the current mix (338 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv BelindaValue
FH crosscourt52%+0.5+1.5+4.1+6.2±3.8
FH through the middle23%−3.2+0.6+0.9−1.7±2.4
FH down the line15%−0.6+4.9−2.8+1.6±4.4
FH slice through the middle10%−15.2±0.0±0.0−15.2±1.3

Lean FH crosscourt: +4.6±2.0 per 100 returns v the current mix (88 returns charted)

2nd serve to the backhand

ReturnNowTourOwnv BelindaValue
BH crosscourt47%+1.5+0.4+0.3+2.2±3.1
BH through the middle30%−2.6+0.7−0.6−2.6±2.4
BH down the line23%−0.5+0.8+1.9+2.2±4.8

Lean BH down the line: +1.5±4.0 per 100 returns v the current mix (207 returns charted, inside the 90% margin)

Belinda Bencic returning

1st serve to the forehand

ReturnNowTourOwnv SuValue
FH through the middle32%+4.2±0.0+0.7+4.9±2.2
FH slice through the middle26%−6.7−0.4+0.5−6.6±1.9
FH crosscourt18%+5.3+0.9+1.3+7.5±3.7
FH down the line13%+1.5+2.7+2.5+6.7±4.3
FH slice crosscourt9%−6.6−0.2+0.6−6.2±2.5

Lean FH crosscourt: +6.2±3.2 per 100 returns v the current mix (1174 returns charted)

1st serve to the backhand

ReturnNowTourOwnv SuValue
BH through the middle47%+6.0+0.5+1.8+8.3±2.0
BH crosscourt34%+7.7−2.0±0.0+5.7±2.9
BH down the line9%+2.2+1.2+3.9+7.2±4.6
BH slice through the middle5%−6.2±0.0−2.5−8.8±2.5
BH slice crosscourt4%−4.2−1.8−0.8−6.8±2.8

Lean BH through the middle: +2.7±1.5 per 100 returns v the current mix (857 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv SuValue
FH through the middle44%−3.2+0.6−1.1−3.7±2.8
FH crosscourt25%+0.5−2.7+1.9−0.2±4.3
FH down the line23%−0.6+3.2+1.6+4.2±5.0
FH slice through the middle5%−15.2+0.2±0.0−15.0±1.7
FH slice crosscourt3%−14.9+0.3±0.0−14.6±1.5

Lean FH down the line: +6.0±4.2 per 100 returns v the current mix (383 returns charted)

2nd serve to the backhand

ReturnNowTourOwnv SuValue
BH crosscourt44%+1.5+2.8+1.8+6.1±3.0
BH through the middle41%−2.6−0.3+0.2−2.7±2.4
BH down the line14%−0.5+5.1+1.3+5.9±5.2
FH through the middle1%−2.7+0.3−1.1−3.4±2.1

Lean BH crosscourt: +3.7±2.1 per 100 returns v the current mix (525 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.

Su Wei Hsieh

Favour

ShotEdgeOwnTheirs
FH to their backhand · rally+6.5±5.0+3.4+3.0
FH to their forehand · return+6.5±4.4+3.5+3.0
BH to their forehand · serve +1+4.2±6.1+5.8−1.5
FH slice to their backhand · rally+3.7±5.1+1.5+2.2
FH slice to the middle · rally+3.0±3.2+1.0+2.0
BH to the middle · rally+2.7±2.9+1.5+1.2

Avoid

ShotEdgeOwnTheirs
BH to their forehand · return +1−6.1±5.4−1.0−5.0
BH to their forehand · rally−4.9±5.6+0.9−5.8
FH to their backhand · return−4.0±5.0+2.1−6.1
BH to their backhand · return +1−4.0±3.8−1.4−2.6
BH to their forehand · return−3.9±5.5−1.6−2.3

Belinda Bencic

Favour

ShotEdgeOwnTheirs
BH to their forehand · serve +1+9.0±6.0+1.5+7.5
BH to their forehand · return+9.0±6.1+6.8+2.2
FH to the middle · return +1+4.8±3.6+2.0+2.9
FH to their backhand · return +1+4.8±5.9+2.3+2.5
FH slice to the middle · rally+4.3±3.2+4.4−0.1
BH to their backhand · serve +1+4.0±4.7+0.9+3.2

Avoid

ShotEdgeOwnTheirs
BH to their forehand · return +1−6.4±5.3−2.4−4.0
BH to their backhand · rally−3.3±4.1+0.5−3.8
FH to their backhand · rally−2.3±4.9+0.7−3.0
BH to the middle · rally−1.8±2.9+0.6−2.4
FH to their forehand · serve +1−1.6±5.0−2.0+0.4

Against Belinda Bencic-like opponents

Su Wei Hsieh vMatchesServe pts wonReturn pts won
All charted opponents–55.2%42.1%
Players most similar to Belinda Bencic2 59.8%38.2%

Similar by tactical fingerprint: Anastasia Potapova, Karolina Pliskova, Anna Kalinskaya, Elise Mertens, Ekaterina Alexandrova, Sorana Cirstea, Shuai Zhang, Emma Raducanu, Victoria Mboko, Shelby Rogers. When two players have rarely met, their records against these lookalikes fill the gap.