RallyIQ

Game plan

Emma Raducanu v Sloane Stephens

Every number combines what Emma Raducanu does well with what Sloane Stephens allows, each measured against the tour average and shrunk toward it when the sample is thin. Flip perspective

Forecast

Emma Raducanu wins, best of 3 55%90%: 28%–79% · best of 5: 56%
Serve points won 56.7% / 55.8% Emma / Sloane · tour 56.3%
Strengths only, no similarity priors 48%serve 56.2% / 56.7%

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 At least one of them is no longer active or has too little charted in the last three seasons, so both are compared on their careers.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 Emma Raducanu's record against Sloane Stephens's tactical lookalikes and in their charted head-to-heads (lookalikes: +4.5 on serve, +7.8 on return vs expectation (351 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

CareerEmmaSloane
Direction choice−0.02 ±0.05
better than 50%
−0.12 ±0.11
better than 32%
Shot selection−0.09 ±0.09
better than 35%
−0.16 ±0.14
better than 31%
Execution+0.76 ±0.31
better than 86%
−0.13 ±0.58
better than 56%
Points left on the table2.53 ±0.07
lower than 63%
2.62 ±0.13
lower than 48%

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: Emma Raducanu −0.06, Sloane Stephens −0.09. 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.

Emma Raducanu serving

Deuce court

1st serveNowEmma winsv SloaneMatchupOptimal
Wide46%68%66%68.2%±5.156% ▲
Body25%56%58%56.9%±6.510% ▼
T29%68%71%70.4%±5.634% ▲

Optimal v Sloane Stephens: +1.1±0.8 per 100 first serves (faults included) over the current mix. Serving T every time would read +4.4 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowEmma winsv SloaneMatchupOptimal
Wide44%71%64%69.1%±5.060% ▲
Body17%51%59%53.6%±8.11% ▼
T39%63%67%66.0%±5.639%

Optimal v Sloane Stephens: +1.0±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.

Sloane Stephens serving

Deuce court

1st serveNowSloane winsv EmmaMatchupOptimal
Wide50%66%64%63.8%±4.865% ▲
Body30%56%57%55.0%±6.015% ▼
T20%63%68%62.6%±6.720%

Optimal v Emma Raducanu: +0.6±0.8 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +2.9 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowSloane winsv EmmaMatchupOptimal
Wide32%60%64%57.6%±5.930% ▼
Body13%53%59%56.1%±8.20% ▼
T55%61%64%60.6%±5.270% ▲

Optimal v Emma Raducanu: +0.4±0.8 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.

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.

Emma Raducanu returning

1st serve to the forehand

ReturnNowTourOwnv SloaneValue
FH through the middle46%+4.2+2.0+1.2+7.3±1.9
FH crosscourt21%+5.3+1.9+0.8+8.0±3.5
FH down the line14%+1.5+5.0+0.6+7.2±4.1
FH slice through the middle12%−6.7+0.8−1.7−7.7±2.5
FH slice crosscourt4%−6.6+0.8−1.3−7.0±2.7

Lean FH crosscourt: +3.4±3.0 per 100 returns v the current mix (954 returns charted)

1st serve to the backhand

ReturnNowTourOwnv SloaneValue
BH through the middle47%+6.0+2.7−0.4+8.4±1.9
BH crosscourt28%+7.7+3.2+2.2+13.1±2.9
BH slice through the middle11%−6.2+0.7−0.4−5.9±2.5
BH down the line10%+2.2+2.5−1.0+3.7±4.4
BH slice crosscourt3%−4.2+0.8±0.0−3.4±2.5

Lean BH crosscourt: +6.1±2.3 per 100 returns v the current mix (834 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv SloaneValue
FH through the middle47%−3.2+2.1−0.2−1.3±2.9
FH crosscourt34%+0.5−0.1+1.6+2.1±4.4
FH down the line17%−0.6−0.2−0.9−1.7±5.3
FH slice through the middle2%−15.2+0.7±0.0−14.5±1.1

Lean FH crosscourt: +2.5±3.3 per 100 returns v the current mix (254 returns charted, inside the 90% margin)

2nd serve to the backhand

ReturnNowTourOwnv SloaneValue
BH through the middle44%−2.6−0.5−2.3−5.4±2.3
BH crosscourt41%+1.5+0.3−0.5+1.3±3.0
BH down the line14%−0.5−2.5−0.4−3.4±5.2
BH slice through the middle1%−11.7−0.6±0.0−12.3±1.0

Lean BH crosscourt: +3.7±2.2 per 100 returns v the current mix (470 returns charted)

Sloane Stephens returning

1st serve to the forehand

ReturnNowTourOwnv EmmaValue
FH through the middle37%+4.2+2.0+2.2+8.4±2.2
FH slice through the middle20%−6.7−0.4+2.1−5.0±2.4
FH crosscourt14%+5.3−1.5+0.7+4.5±3.8
FH down the line13%+1.5−0.6−0.9±0.0±4.3
FH slice crosscourt12%−6.6+0.3+0.3−6.1±2.8

Lean FH through the middle: +6.9±1.7 per 100 returns v the current mix (466 returns charted)

1st serve to the backhand

ReturnNowTourOwnv EmmaValue
BH through the middle43%+6.0−0.1−1.0+4.9±2.0
BH crosscourt32%+7.7+0.3−0.8+7.3±2.9
BH down the line10%+2.2−3.1−1.1−2.0±4.3
BH slice through the middle8%−6.2−2.7−1.0−9.9±2.5
BH slice crosscourt4%−4.2−1.3−0.6−6.1±2.9

Lean BH crosscourt: +4.6±2.2 per 100 returns v the current mix (509 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv EmmaValue
FH through the middle58%−3.2+0.2−1.6−4.6±2.6
FH crosscourt26%+0.5−1.5+1.9+0.9±4.0
FH down the line10%−0.6−0.5−1.2−2.3±4.3
FH slice through the middle6%−15.2−0.8−0.3−16.3±1.9

Lean FH crosscourt: +4.5±3.3 per 100 returns v the current mix (88 returns charted)

2nd serve to the backhand

ReturnNowTourOwnv EmmaValue
BH through the middle45%−2.6−0.9−1.2−4.7±2.3
BH crosscourt41%+1.5−1.0−1.4−0.9±3.2
BH down the line6%−0.5−0.1+0.7+0.1±4.9
FH through the middle5%−2.7±0.0−1.6−4.3±2.0
FH inside-out3%+1.4+2.3−1.2+2.5±3.5

Lean BH down the line: +2.7±4.9 per 100 returns v the current mix (299 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.

Emma Raducanu

Favour

ShotEdgeOwnTheirs
FH to their backhand · return+4.1±3.4+3.6+0.5
FH to the middle · return+3.9±1.6+1.8+2.1
FH to their forehand · return+2.4±3.1+0.6+1.8
FH to the middle · serve +1+2.2±2.0+0.9+1.3
BH to their backhand · return+2.0±2.2+1.0+1.0
BH to their backhand · return +1+1.6±2.5+2.0−0.4

Avoid

ShotEdgeOwnTheirs
FH to their backhand · rally−2.3±2.1+0.6−2.8
BH to the middle · return +1−2.2±1.9+0.4−2.6
FH to their backhand · serve +1−2.1±2.8+0.7−2.9
BH to their forehand · rally−2.1±3.1−0.6−1.5
FH slice to the middle · rally−1.9±2.6−2.3+0.4

Sloane Stephens

Favour

ShotEdgeOwnTheirs
BH to their forehand · return +1+4.6±4.1+2.3+2.3
FH to their forehand · rally+2.8±1.7+1.3+1.5
FH to their backhand · rally+1.6±2.2+0.7+0.9
FH slice to the middle · return+1.5±2.3−0.2+1.7
BH to their forehand · rally+1.4±2.9+0.6+0.8
FH to their backhand · return +1+1.3±3.5−0.6+1.9

Avoid

ShotEdgeOwnTheirs
BH slice to the middle · rally−3.7±2.1−2.6−1.1
FH slice to the middle · rally−3.6±2.6−1.7−1.8
BH to the middle · return +1−3.6±1.9−2.8−0.7
FH to the middle · rally−3.2±1.4−2.5−0.7
FH to the middle · return +1−2.5±2.2+0.1−2.6

Against Sloane Stephens-like opponents

Emma Raducanu vMatchesServe pts wonReturn pts won
All charted opponents–58.0%43.3%
Players most similar to Sloane Stephens3 61.0%49.5%

Similar by tactical fingerprint: Coco Gauff, Iva Jovic, Eva Lys, Marie Bouzkova, Kimberly Birrell, Paula Badosa, Lin Zhu, Carla Suarez Navarro, Marion Bartoli. When two players have rarely met, their records against these lookalikes fill the gap.