RallyIQ

Game plan

Kei Nishikori v Grigor Dimitrov

Every number combines what Kei Nishikori does well with what Grigor Dimitrov allows, each measured against the tour average and shrunk toward it when the sample is thin. Flip perspective

Forecast

Kei Nishikori wins, best of 3 37%90%: 18%–61% · best of 5: 34%
Serve points won 61.5% / 64.1% Kei / Grigor · tour 63.4%
Strengths only, no similarity priors 45%serve 62.1% / 63.0%

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 At least one of them is no longer active or has too little charted in the last three seasons, so both are compared on their careers.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 Kei Nishikori's record against Grigor Dimitrov's tactical lookalikes and in their charted head-to-heads (lookalikes: −1.8 on serve, −3.3 on return vs expectation (1686 points); head-to-head: +1.2 on serve, +1.1 on return vs expectation (214 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

CareerKeiGrigor
Direction choice+0.06 ±0.05
better than 73%
−0.07 ±0.05
better than 38%
Shot selection−0.30 ±0.07
better than 23%
−0.42 ±0.09
better than 15%
Execution−0.05 ±0.28
better than 66%
−0.13 ±0.23
better than 61%
Points left on the table2.29 ±0.07
lower than 85%
2.78 ±0.07
lower than 32%

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: Kei Nishikori −1.65, Grigor Dimitrov −0.05. 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.

Kei Nishikori serving

Deuce court

1st serveNowKei winsv GrigorMatchupOptimal
Wide42%70%72%69.4%±3.142%
Body16%62%64%63.2%±5.23% ▼
T42%73%74%72.2%±3.155% ▲

Optimal v Grigor Dimitrov: +0.8±0.6 per 100 first serves (faults included) over the current mix. Serving T every time would read +2.7 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowKei winsv GrigorMatchupOptimal
Wide47%70%74%71.3%±3.260% ▲
Body17%63%65%65.2%±5.44% ▼
T36%68%72%68.0%±3.736%

Optimal v Grigor Dimitrov: +0.4±0.6 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +2.2 per 100 first serves in before the returner adjusts.

Grigor Dimitrov serving

Deuce court

1st serveNowGrigor winsv KeiMatchupOptimal
Wide46%74%71%71.8%±2.940% ▼
Body7%67%65%68.6%±6.00% ▼
T47%79%76%80.4%±2.660% ▲

Optimal v Kei Nishikori: +0.7±0.5 per 100 first serves (faults included) over the current mix. Serving T every time would read +4.8 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowGrigor winsv KeiMatchupOptimal
Wide50%76%74%77.5%±2.863% ▲
Body10%64%61%62.4%±6.70% ▼
T40%72%74%73.7%±3.137% ▼

Optimal v Kei Nishikori: +0.7±0.5 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.

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.

Kei Nishikori returning

1st serve to the forehand

ReturnNowTourOwnv GrigorValue
FH through the middle46%+4.3−1.1−0.5+2.6±1.4
FH crosscourt24%+5.5+1.1+0.5+7.0±2.7
FH down the line19%+1.7+1.2−0.1+2.9±3.0
FH slice through the middle6%−4.2+1.6+0.3−2.3±2.0
FH slice down the line3%−4.3+0.4−0.6−4.4±3.1

Lean FH crosscourt: +4.0±2.3 per 100 returns v the current mix (1224 returns charted)

1st serve to the backhand

ReturnNowTourOwnv GrigorValue
BH crosscourt29%+8.8+1.9−0.2+10.5±2.1
BH through the middle24%+6.4−1.0+0.7+6.1±1.7
BH slice through the middle21%−4.2−1.9−0.2−6.4±1.7
BH slice crosscourt15%+0.5+1.4+1.4+3.2±2.4
BH slice down the line5%−8.4−1.3−2.1−11.7±3.3

Lean BH crosscourt: +7.4±1.7 per 100 returns v the current mix (1117 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv GrigorValue
FH through the middle44%−3.5+0.4−0.9−3.9±2.0
FH down the line28%−1.8−3.1+0.9−4.0±3.8
FH crosscourt27%−0.2+1.0−2.4−1.6±3.7
FH slice down the line1%−9.4−0.3±0.0−9.8±1.3

Lean FH crosscourt: +1.7±3.0 per 100 returns v the current mix (423 returns charted, inside the 90% margin)

2nd serve to the backhand

ReturnNowTourOwnv GrigorValue
BH crosscourt47%+1.0+2.6+0.2+3.8±1.7
BH through the middle30%−2.9−0.7−0.3−3.9±1.5
BH down the line14%−0.2+2.2+2.0+4.1±4.0
FH through the middle3%−2.9−0.4−0.9−4.1±1.9
FH inside-out2%+1.0+1.4+0.9+3.2±2.9

Lean BH down the line: +3.2±3.5 per 100 returns v the current mix (845 returns charted, inside the 90% margin)

Grigor Dimitrov returning

1st serve to the forehand

ReturnNowTourOwnv KeiValue
FH through the middle51%+4.3+0.4+0.7+5.4±1.3
FH down the line25%+1.7−0.4+2.3+3.6±2.8
FH crosscourt13%+5.5−0.9+0.1+4.7±3.0
FH slice through the middle7%−4.2+0.2+1.4−2.6±2.1
FH slice down the line2%−4.3+1.0+1.0−2.4±3.1

Lean FH through the middle: +1.4±1.0 per 100 returns v the current mix (2614 returns charted)

1st serve to the backhand

ReturnNowTourOwnv KeiValue
BH slice through the middle45%−4.2+0.4±0.0−3.8±1.5
BH slice crosscourt19%+0.5+1.0+0.7+2.2±2.1
BH through the middle14%+6.4−2.7+0.7+4.4±1.6
BH slice down the line9%−8.4+1.8+2.6−4.1±3.1
BH down the line7%+4.2−0.8+2.0+5.4±3.8
BH crosscourt5%+8.8±0.0+1.8+10.6±2.7

Lean BH crosscourt: +10.5±2.7 per 100 returns v the current mix (3178 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv KeiValue
FH through the middle53%−3.5+0.5−0.3−3.3±2.0
FH down the line25%−1.8+3.1+1.7+3.0±4.0
FH crosscourt18%−0.2+1.9−0.4+1.3±3.8
FH slice through the middle2%−12.7+0.5−0.4−12.7±1.9
FH slice crosscourt1%−12.5+0.3±0.0−12.2±1.4

Lean FH down the line: +4.2±3.3 per 100 returns v the current mix (631 returns charted)

2nd serve to the backhand

ReturnNowTourOwnv KeiValue
BH through the middle24%−2.9−1.1+1.1−2.9±1.5
BH slice through the middle21%−11.3−1.7±0.0−13.0±2.0
BH slice crosscourt19%−4.0−1.6+0.4−5.2±2.1
BH down the line12%−0.2−0.6−0.5−1.3±3.8
BH crosscourt8%+1.0+0.4+1.3+2.7±2.3

Lean BH crosscourt: +7.5±2.3 per 100 returns v the current mix (2339 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.

Kei Nishikori

Favour

ShotEdgeOwnTheirs
FH volley to their forehand · rally+3.3±4.9+3.3+0.1
BH slice to their backhand · return+2.9±2.2+1.9+1.1
FH to their forehand · return+2.7±2.5+2.5+0.2
FH slice to the middle · return+2.0±2.0+1.3+0.7
BH to their backhand · return+1.1±1.3+1.5−0.4
BH to their forehand · serve +1+0.6±3.0+2.7−2.0

Avoid

ShotEdgeOwnTheirs
BH volley to their backhand · rally−6.3±5.2−2.7−3.6
BH volley to their forehand · rally−6.2±5.1−2.5−3.6
FH to their forehand · serve +1−6.0±1.8−1.9−4.1
BH slice to the middle · rally−5.6±1.8−3.0−2.6
BH slice to their backhand · rally−4.7±1.4−1.1−3.6

Grigor Dimitrov

Favour

ShotEdgeOwnTheirs
FH to their forehand · serve +1+3.5±1.8+1.9+1.6
FH to their forehand · return +1+3.2±2.3+1.5+1.7
BH slice to their backhand · serve +1+2.8±2.3+1.9+0.9
FH to their backhand · return+2.7±2.1+0.2+2.4
FH to the middle · return +1+1.8±1.7+1.4+0.3
FH to the middle · return+1.6±1.1+0.6+1.0

Avoid

ShotEdgeOwnTheirs
BH to their forehand · serve +1−5.6±3.7−2.5−3.0
BH to their forehand · rally−5.3±2.1−1.8−3.5
FH volley to their backhand · rally−4.7±5.4−0.7−4.0
BH to the middle · serve +1−3.2±1.6−2.8−0.4
BH to their forehand · return +1−2.6±3.5+1.0−3.6

Against Grigor Dimitrov-like opponents

Kei Nishikori vMatchesServe pts wonReturn pts won
All charted opponents–61.9%37.6%
Players most similar to Grigor Dimitrov9 59.8%31.3%
Grigor Dimitrov (charted head-to-head)1 63.4%38.1%

Similar by tactical fingerprint: Casper Ruud, Stefanos Tsitsipas, Lorenzo Musetti, Matteo Berrettini, Marton Fucsovics, Stan Wawrinka, Christopher Oconnell, Dominic Thiem, Tim Van Rijthoven, Roger Federer. When two players have rarely met, their records against these lookalikes fill the gap.

Charted head-to-head