RallyIQ

Game plan

Lin Zhu v Elena Gabriela Ruse

Every number combines what Lin Zhu does well with what Elena Gabriela Ruse allows, each measured against the tour average and shrunk toward it when the sample is thin. Flip perspective

Forecast

Lin Zhu wins, best of 3 40%90%: 13%–74% · best of 5: 38%
Serve points won 54.1% / 56.0% Lin / Elena · tour 56.4%
Strengths only, no similarity priors 46%serve 54.5% / 55.3%

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 At least one of them is no longer active or has too little charted in the last three seasons, so both are compared on their careers.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 Lin Zhu's record against Elena Gabriela Ruse's tactical lookalikes and in their charted head-to-heads (lookalikes: −5.8 on serve, −11.4 on return vs expectation (216 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

CareerLinElena
Direction choice−0.19 ±0.13
better than 18%
+0.07 ±0.12
better than 68%
Shot selection+0.09 ±0.16
better than 53%
+0.17 ±0.22
better than 61%
Execution−0.19 ±0.84
better than 50%
−1.82 ±0.59
better than 6%
Points left on the table2.64 ±0.17
lower than 45%
2.36 ±0.17
lower than 79%

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.

Lin Zhu serving

Deuce court

1st serveNowLin winsv ElenaMatchupOptimal
Wide50%62%68%63.9%±8.866% ▲
Body23%64%55%62.1%±11.38% ▼
T26%57%72%62.1%±11.326%

Optimal v Elena Gabriela Ruse: +0.2±1.2 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +0.9 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowLin winsv ElenaMatchupOptimal
Wide34%56%70%60.2%±11.519% ▼
Body25%55%53%51.4%±10.925%
T41%61%63%59.0%±10.056% ▲

Optimal v Elena Gabriela Ruse: +0.4±1.1 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +2.7 per 100 first serves in before the returner adjusts.

Elena Gabriela Ruse serving

Deuce court

1st serveNowElena winsv LinMatchupOptimal
Wide47%64%74%72.9%±8.162% ▲
Body16%60%59%61.1%±12.60% ▼
T37%69%73%74.1%±9.638%

Optimal v Lin Zhu: +0.5±1.2 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +2.6 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowElena winsv LinMatchupOptimal
Wide35%61%71%66.6%±10.350% ▲
Body11%48%60%51.9%±13.50% ▼
T54%65%64%64.5%±10.050% ▼

Optimal v Lin Zhu: +0.6±1.1 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +2.8 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.

Lin Zhu returning

1st serve to the forehand

ReturnNowTourOwnv ElenaValue
FH through the middle48%+4.2+1.1+0.9+6.1±3.0
FH crosscourt24%+5.3−1.8−2.1+1.4±4.4
FH down the line16%+1.5−0.6+1.1+2.1±4.7
FH slice through the middle6%−6.7−0.6+1.3−6.0±2.3
FH slice crosscourt5%−6.6−0.6−0.1−7.3±2.0

Lean FH through the middle: +3.2±2.1 per 100 returns v the current mix (185 returns charted)

1st serve to the backhand

ReturnNowTourOwnv ElenaValue
BH through the middle46%+6.0±0.0−1.2+4.8±2.9
BH crosscourt32%+7.7−0.5+0.1+7.3±3.7
BH down the line11%+2.2+2.0−2.2+2.0±4.3
BH slice through the middle7%−6.2+0.1+1.6−4.5±1.9
BH slice crosscourt4%−4.2−0.2+1.1−3.3±2.0

Lean BH crosscourt: +3.0±2.9 per 100 returns v the current mix (136 returns charted)

2nd serve to the backhand

ReturnNowTourOwnv ElenaValue
BH through the middle47%−2.6−0.2+2.2−0.7±2.7
BH crosscourt32%+1.5+0.2−0.7+1.0±3.4
BH down the line21%−0.5+0.2−1.1−1.5±4.7

Lean BH crosscourt: +1.3±2.8 per 100 returns v the current mix (57 returns charted, inside the 90% margin)

Elena Gabriela Ruse returning

1st serve to the forehand

ReturnNowTourOwnv LinValue
FH through the middle50%+4.2−1.7−1.0+1.5±2.9
FH crosscourt22%+5.3+1.7+3.1+10.1±4.4
FH down the line16%+1.5−3.5+2.1+0.1±4.6
FH slice through the middle10%−6.7−1.4+0.2−7.9±2.3
FH slice crosscourt3%−6.6−1.5+0.7−7.5±1.8

Lean FH crosscourt: +8.1±3.8 per 100 returns v the current mix (187 returns charted)

1st serve to the backhand

ReturnNowTourOwnv LinValue
BH through the middle50%+6.0−0.6+0.9+6.3±2.8
BH crosscourt20%+7.7−2.4+1.9+7.3±3.5
BH down the line20%+2.2+0.5+0.9+3.6±4.5
BH slice down the line5%−12.5−0.8±0.0−13.3±1.6
BH slice through the middle5%−6.2−1.0−1.8−9.0±1.8

Lean BH crosscourt: +3.0±3.3 per 100 returns v the current mix (121 returns charted, inside the 90% margin)

2nd serve to the forehand

ReturnNowTourOwnv LinValue
FH through the middle49%−3.2+1.2+3.5+1.5±3.0
FH crosscourt36%+0.5−0.3+2.6+2.8±4.1
FH down the line15%−0.6±0.0±0.0−0.6±4.5

Lean FH crosscourt: +1.1±3.1 per 100 returns v the current mix (53 returns charted, inside the 90% margin)

2nd serve to the backhand

ReturnNowTourOwnv LinValue
BH through the middle48%−2.6−1.4−0.4−4.4±2.8
BH crosscourt37%+1.5−2.6+2.4+1.3±3.6
BH down the line16%−0.5+1.3+4.2+5.0±4.7

Lean BH crosscourt: +2.1±2.7 per 100 returns v the current mix (82 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 hard. Each player's hard record is shrunk toward their all-surface one, so a thin sample on it moves the numbers only a little.

Lin Zhu

Favour

ShotEdgeOwnTheirs
FH to the middle · return+6.2±3.8+3.8+2.4
BH to the middle · rally+3.9±3.0+2.8+1.1
BH to their backhand · serve +1+3.8±5.2+2.1+1.7
FH to the middle · serve +1+3.1±3.8+2.5+0.6
BH to their backhand · return +1+2.6±5.2−0.1+2.7
BH to their forehand · rally+2.4±6.6+0.2+2.2

Avoid

ShotEdgeOwnTheirs
FH to their backhand · rally−5.9±5.2−4.4−1.5
FH to their forehand · serve +1−4.4±6.0−3.0−1.4
FH to their forehand · rally−2.0±4.2+0.1−2.0
BH to their backhand · return−0.5±5.0+1.4−1.9
BH to the middle · serve +1−0.5±3.6+2.1−2.6

Elena Gabriela Ruse

Favour

ShotEdgeOwnTheirs
FH to their forehand · return+12.1±6.6+4.9+7.2
FH to their forehand · rally+5.8±4.0+0.4+5.4
FH to the middle · serve +1+3.0±4.1+0.3+2.7
BH to their forehand · return+2.8±6.9−2.6+5.4
FH to the middle · return+1.7±3.5−0.1+1.7
FH to their forehand · serve +1+1.6±6.0−0.4+2.0

Avoid

ShotEdgeOwnTheirs
BH to the middle · rally−5.8±3.0−5.1−0.7
FH to their backhand · rally−4.6±5.3−1.9−2.7
FH to the middle · rally−4.4±3.3−3.7−0.7
BH to their forehand · rally−3.0±6.2−5.4+2.4
BH to their backhand · return−2.8±4.8−5.9+3.1

Against Elena Gabriela Ruse-like opponents

Lin Zhu vMatchesServe pts wonReturn pts won
All charted opponents–51.5%38.8%
Players most similar to Elena Gabriela Ruse2 49.2%26.5%

Similar by tactical fingerprint: Naomi Osaka, Anastasia Potapova, Karolina Pliskova, Ekaterina Alexandrova, Serena Williams, Clara Tauson, Viktoria Hruncakova, Veronika Kudermetova, Danielle Collins, Ana Konjuh. When two players have rarely met, their records against these lookalikes fill the gap.