RallyIQ

Game plan

Ben Shelton v Tallon Griekspoor

Every number combines what Ben Shelton does well with what Tallon Griekspoor allows, each measured against the tour average and shrunk toward it when the sample is thin. Flip perspective

Forecast

Ben Shelton wins, best of 3 61%90%: 39%–81% · best of 5: 64%
Serve points won 71.2% / 68.7% Ben / Tallon · tour 63.5%
Strengths only, no similarity priors 59%serve 70.9% / 68.9%

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. Both were charted enough in the last three seasons, so those carry the most weight. The result is then nudged by Ben Shelton's record against Tallon Griekspoor's tactical lookalikes and in their charted head-to-heads (lookalikes: +1.2 on serve, +1.1 on return vs expectation (747 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

CareerBenTallon
Direction choice−0.37 ±0.06
better than 3%
+0.19 ±0.03
better than 93%
Shot selection+0.04 ±0.16
better than 57%
+0.07 ±0.08
better than 61%
Execution−0.67 ±0.48
better than 38%
−1.38 ±0.28
better than 13%
Points left on the table3.64 ±0.10
lower than 7%
2.42 ±0.06
lower than 71%

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: Ben Shelton −1.47, Tallon Griekspoor −1.88. 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.

Ben Shelton serving

Deuce court

1st serveNowBen winsv TallonMatchupOptimal
Wide46%72%76%74.5%±3.346%
Body14%62%64%63.2%±6.31% ▼
T40%72%79%76.8%±3.353% ▲

Optimal v Tallon Griekspoor: +1.2±0.7 per 100 first serves (faults included) over the current mix. Serving T every time would read +2.9 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowBen winsv TallonMatchupOptimal
Wide51%74%77%77.8%±3.051%
Body14%71%66%73.8%±5.61% ▼
T35%80%74%81.7%±3.448% ▲

Optimal v Tallon Griekspoor: +0.5±0.7 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +3.1 per 100 first serves in before the returner adjusts.

Tallon Griekspoor serving

Deuce court

1st serveNowTallon winsv BenMatchupOptimal
Wide48%74%75%76.2%±3.144% ▼
Body8%65%61%62.7%±7.50% ▼
T43%77%77%79.6%±3.156% ▲

Optimal v Ben Shelton: +0.7±0.5 per 100 first serves (faults included) over the current mix. Serving T every time would read +3.1 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowTallon winsv BenMatchupOptimal
Wide54%76%77%79.9%±3.167% ▲
Body9%60%64%60.4%±7.80% ▼
T37%73%74%74.9%±3.533% ▼

Optimal v Ben Shelton: +0.9±0.5 per 100 first serves (faults included) over the current mix. Serving wide every time would read +3.5 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.

Ben Shelton returning

1st serve to the forehand

ReturnNowTourOwnv TallonValue
FH through the middle49%+4.3−0.4−0.6+3.3±1.7
FH down the line18%+1.7+1.6−2.1+1.1±3.5
FH slice through the middle13%−4.2+2.0−2.5−4.7±1.9
FH crosscourt13%+5.5−0.2−3.3+2.0±3.5
FH slice down the line4%−4.3−2.3+0.7−5.9±3.1

Lean FH through the middle: +2.3±1.2 per 100 returns v the current mix (792 returns charted)

1st serve to the backhand

ReturnNowTourOwnv TallonValue
BH through the middle35%+6.4+0.3−1.7+5.0±1.6
BH slice through the middle21%−4.2−0.3−3.9−8.4±1.8
BH down the line17%+4.2−2.6−3.1−1.4±3.2
BH crosscourt15%+8.8−5.4−4.4−1.0±3.0
BH slice down the line8%−8.4+2.5−3.9−9.7±3.0

Lean BH through the middle: +6.5±1.4 per 100 returns v the current mix (972 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv TallonValue
FH through the middle58%−3.5−2.7+0.4−5.8±2.0
FH crosscourt22%−0.2+1.2−1.8−0.8±3.8
FH down the line20%−1.8−8.0−0.3−10.0±4.1

Lean FH crosscourt: +4.8±3.3 per 100 returns v the current mix (294 returns charted)

2nd serve to the backhand

ReturnNowTourOwnv TallonValue
BH through the middle56%−2.9+0.9−0.9−2.9±1.5
BH crosscourt17%+1.0−1.0−3.8−3.8±2.9
BH down the line17%−0.2−3.4−2.8−6.4±3.7
FH through the middle6%−2.9±0.0+0.4−2.5±1.9
FH inside-in2%+0.6−2.1−1.8−3.4±3.4

Lean FH through the middle: +1.1±2.2 per 100 returns v the current mix (622 returns charted, inside the 90% margin)

Tallon Griekspoor returning

1st serve to the forehand

ReturnNowTourOwnv BenValue
FH through the middle42%+4.3−2.3−0.7+1.2±1.8
FH crosscourt26%+5.5−2.2−2.4+0.9±3.0
FH slice through the middle14%−4.2−3.3−2.7−10.3±2.0
FH down the line11%+1.7−3.9−2.3−4.5±3.8
FH slice down the line5%−4.3−1.9+0.2−5.9±2.8

Lean FH through the middle: +3.0±1.4 per 100 returns v the current mix (1906 returns charted)

1st serve to the backhand

ReturnNowTourOwnv BenValue
BH through the middle32%+6.4−1.5+0.1+5.0±1.6
BH crosscourt27%+8.8−5.7−1.6+1.5±2.5
BH slice through the middle20%−4.2−3.1−1.3−8.6±1.9
BH slice crosscourt8%+0.5−4.8−0.8−5.1±2.8
BH down the line8%+4.2−2.1−2.5−0.4±3.9

Lean BH through the middle: +5.9±1.4 per 100 returns v the current mix (2010 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv BenValue
FH crosscourt40%−0.2−1.0−3.4−4.6±3.8
FH through the middle39%−3.5−3.0−1.8−8.3±2.2
FH down the line15%−1.8−4.1−4.3−10.2±4.7
FH slice through the middle5%−12.7−2.6−0.9−16.1±2.1
FH slice down the line1%−9.4−0.4±0.0−9.8±1.3

Lean FH crosscourt: +2.8±2.6 per 100 returns v the current mix (471 returns charted)

2nd serve to the backhand

ReturnNowTourOwnv BenValue
BH through the middle38%−2.9−2.1−0.9−5.9±1.6
BH crosscourt31%+1.0−4.1−1.5−4.6±2.4
BH down the line9%−0.2−2.9−3.4−6.5±4.6
FH through the middle9%−2.9+0.6−1.8−4.1±2.0
FH inside-in6%+0.6+2.0−3.4−0.8±4.2

Lean FH inside-in: +4.3±4.1 per 100 returns v the current mix (1307 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.

Ben Shelton

Favour

ShotEdgeOwnTheirs
BH to their forehand · rally+1.9±2.5−0.1+2.0
FH to the middle · return +1+1.7±1.9+0.1+1.6
BH to the middle · return +1+1.3±1.7+1.1+0.2
FH to their forehand · serve +1+0.5±2.0+1.0−0.4
BH slice to the middle · return +1−0.1±2.0+0.1−0.2
BH to the middle · rally−0.3±1.2−0.7+0.5

Avoid

ShotEdgeOwnTheirs
BH volley to their backhand · rally−8.6±5.5−7.0−1.6
BH to their backhand · return−6.5±1.9−3.7−2.8
BH slice to their backhand · return−6.4±2.5−1.9−4.5
BH to their forehand · return−6.3±3.1−1.9−4.4
FH to their forehand · return−5.9±3.0−4.5−1.4

Tallon Griekspoor

Favour

ShotEdgeOwnTheirs
Smash to their forehand · rally+4.4±4.3+2.1+2.3
FH volley to their backhand · rally+2.7±5.5−0.1+2.8
FH to their forehand · return +1+2.4±2.9+0.1+2.3
FH to their backhand · return +1+1.9±2.7+0.2+1.7
FH to the middle · return +1+1.8±2.1+0.5+1.3
BH slice to the middle · rally+1.5±1.9+0.5+1.0

Avoid

ShotEdgeOwnTheirs
BH volley to their backhand · rally−15.7±5.3−8.7−7.0
FH to their backhand · return−7.4±2.6−4.5−2.9
FH slice to the middle · return−7.4±2.0−4.2−3.1
BH to their backhand · return−6.6±2.0−4.2−2.4
FH volley to their forehand · rally−6.3±5.2−1.6−4.7

Against Tallon Griekspoor-like opponents

Ben Shelton vMatchesServe pts wonReturn pts won
All charted opponents–65.5%31.9%
Players most similar to Tallon Griekspoor5 66.1%32.4%

Similar by tactical fingerprint: Stefanos Tsitsipas, Arthur Fils, Tommy Paul, Felix Auger Aliassime, Alexei Popyrin, Zizou Bergs, Dominic Thiem, Lloyd Harris, Leonardo Mayer. When two players have rarely met, their records against these lookalikes fill the gap.