RallyIQ

Game plan

Boris Becker v Radek Stepanek

Every number combines what Boris Becker does well with what Radek Stepanek allows, each measured against the tour average and shrunk toward it when the sample is thin. Flip perspective

Forecast

Boris Becker wins, best of 3 80%90%: 57%–93% · best of 5: 85%
Serve points won 69.4% / 62.7% Boris / Radek · tour 65.7%
Strengths only, no similarity priors 82%serve 70.0% / 62.5%

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 At least one of them is no longer active or has too little charted in the last three seasons, so both are compared on their careers.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 Boris Becker's record against Radek Stepanek's tactical lookalikes and in their charted head-to-heads (lookalikes: −1.5 on serve, −0.5 on return vs expectation (1905 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

CareerBorisRadek
Direction choice+0.03 ±0.05
better than 65%
+0.07 ±0.11
better than 74%
Shot selection+0.33 ±0.11
better than 83%
+0.44 ±0.15
better than 88%
Execution−0.37 ±0.22
better than 50%
−0.90 ±0.61
better than 27%
Points left on the table3.75 ±0.16
lower than 5%
3.18 ±0.23
lower than 13%

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.

Boris Becker serving

Deuce court

1st serveNowBoris winsv RadekMatchupOptimal
Wide41%78%73%77.8%±4.437% ▼
Body9%70%72%77.3%±6.80% ▼
T50%81%80%84.7%±3.763% ▲

Optimal v Radek Stepanek: +0.3±0.6 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +3.5 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowBoris winsv RadekMatchupOptimal
Wide49%78%74%78.8%±4.662% ▲
Body12%71%69%75.7%±7.90% ▼
T39%75%75%78.1%±4.638% ▼

Optimal v Radek Stepanek: +0.2±0.7 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +0.6 per 100 first serves in before the returner adjusts.

Radek Stepanek serving

Deuce court

1st serveNowRadek winsv BorisMatchupOptimal
Wide48%72%73%72.7%±4.935% ▼
Body13%62%66%64.2%±8.126% ▲
T39%72%72%69.3%±5.739%

Optimal v Boris Becker: +0.1±0.7 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +2.4 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowRadek winsv BorisMatchupOptimal
Wide43%68%70%64.7%±5.939% ▼
Body9%62%61%59.7%±10.40% ▼
T48%72%71%71.4%±5.261% ▲

Optimal v Boris Becker: +0.3±0.7 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +3.9 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.

Boris Becker returning

1st serve to the forehand

ReturnNowTourOwnv RadekValue
FH through the middle42%+4.3−1.3−2.0+0.9±2.0
FH down the line34%+1.7+2.1−4.3−0.5±3.3
FH crosscourt19%+5.5+2.7+1.9+10.1±3.6
FH slice through the middle2%−4.2+2.6−0.5−2.1±2.0
FH slice down the line1%−4.3−1.1±0.0−5.4±2.2

Lean FH crosscourt: +8.0±3.3 per 100 returns v the current mix (2642 returns charted)

1st serve to the backhand

ReturnNowTourOwnv RadekValue
BH through the middle29%+6.4−2.2+0.9+5.1±2.0
BH slice through the middle20%−4.2+3.0−1.3−2.5±2.0
BH down the line18%+4.2+0.1+4.9+9.3±3.7
BH slice crosscourt15%+0.5+5.9+1.7+8.1±2.4
BH crosscourt12%+8.8+1.6+1.0+11.4±2.9

Lean BH crosscourt: +6.3±2.7 per 100 returns v the current mix (3917 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv RadekValue
FH through the middle36%−3.5+0.8−0.5−3.1±2.6
FH down the line32%−1.8+2.2+0.7+1.2±4.2
FH crosscourt28%−0.2+2.8+2.3+4.8±3.8
BH slice through the middle1%−6.9+0.5+0.4−6.0±1.6
BH inside-in1%+2.5+2.9+1.6+6.9±3.0

Lean FH crosscourt: +4.4±3.2 per 100 returns v the current mix (747 returns charted)

2nd serve to the backhand

ReturnNowTourOwnv RadekValue
BH through the middle26%−2.9−1.9+0.6−4.2±1.9
BH slice crosscourt21%−4.0+3.0−0.9−2.0±2.0
BH crosscourt19%+1.0+6.4+1.6+9.0±2.5
BH down the line13%−0.2−2.4−1.0−3.6±4.2
BH slice through the middle10%−11.3+3.9+0.4−7.0±1.8

Lean BH crosscourt: +10.1±2.2 per 100 returns v the current mix (2680 returns charted)

Radek Stepanek returning

1st serve to the forehand

ReturnNowTourOwnv BorisValue
FH through the middle45%+4.3−3.1−1.6−0.4±2.1
FH down the line35%+1.7+0.4−0.8+1.3±3.4
FH crosscourt10%+5.5+1.3+1.5+8.2±3.5
FH slice through the middle5%−4.2−0.3+0.1−4.5±2.1
BH inside-in2%+7.7+1.3−3.6+5.4±2.4

Lean FH crosscourt: +7.3±3.5 per 100 returns v the current mix (311 returns charted)

1st serve to the backhand

ReturnNowTourOwnv BorisValue
BH crosscourt36%+8.8+0.5−3.6+5.7±2.8
BH through the middle35%+6.4+2.7−4.2+4.9±2.1
BH down the line13%+4.2+0.6−4.1+0.7±3.8
BH slice through the middle8%−4.2−2.1−1.9−8.2±1.8
BH slice crosscourt5%+0.5−0.1+1.7+2.2±2.3

Lean BH crosscourt: +2.4±2.0 per 100 returns v the current mix (276 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv BorisValue
FH down the line47%−1.8+1.5+2.0+1.7±3.8
FH through the middle38%−3.5±0.0−1.2−4.6±2.3
FH crosscourt15%−0.2−0.8+2.1+1.0±3.2

Lean FH down the line: +2.5±2.2 per 100 returns v the current mix (92 returns charted)

2nd serve to the backhand

ReturnNowTourOwnv BorisValue
BH crosscourt49%+1.0+1.5+1.8+4.3±2.5
BH through the middle35%−2.9−2.0−1.8−6.6±2.0
BH down the line17%−0.2+3.2+0.9+3.9±3.9

Lean BH crosscourt: +3.9±1.6 per 100 returns v the current mix (138 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.

Boris Becker

Favour

ShotEdgeOwnTheirs
FH to their backhand · serve +1+13.5±5.1+8.8+4.6
BH to their forehand · return +1+10.3±6.3−1.8+12.1
FH to their backhand · return +1+6.9±5.3+3.7+3.2
FH to their forehand · return+6.0±5.8+5.0+1.0
FH to their forehand · serve +1+5.8±5.4+7.3−1.5
BH to their backhand · return+5.2±4.1+4.0+1.2

Avoid

ShotEdgeOwnTheirs
BH to the middle · return +1−7.9±2.8−7.5−0.4
FH to the middle · rally−4.7±3.5−4.3−0.4
FH to their backhand · rally−3.3±4.6−2.6−0.8
BH to the middle · rally−3.0±3.0−3.2+0.2
FH to the middle · return−2.1±3.1−0.9−1.2

Radek Stepanek

Favour

ShotEdgeOwnTheirs
BH to their backhand · return+5.9±4.1+4.1+1.8
BH to their forehand · serve +1+5.7±6.1+1.5+4.2
FH to their forehand · serve +1+4.6±4.6+2.1+2.5
BH volley to their backhand · serve +1+4.2±5.5+3.2+1.0
FH to their forehand · return +1+3.9±5.9−0.1+4.0
BH to their backhand · return +1+3.1±4.6+0.5+2.6

Avoid

ShotEdgeOwnTheirs
BH volley to their forehand · rally−9.0±7.7−5.5−3.6
FH to their forehand · rally−8.6±4.8−6.1−2.4
FH to their backhand · return +1−7.5±5.6−4.2−3.3
BH to the middle · rally−5.6±3.1−0.6−5.0
BH to the middle · return +1−5.0±3.5+2.7−7.7

Against Radek Stepanek-like opponents

Boris Becker vMatchesServe pts wonReturn pts won
All charted opponents–66.2%36.6%
Players most similar to Radek Stepanek8 64.4%36.3%

Similar by tactical fingerprint: Tomas Machac, Mischa Zverev, Mario Ancic, Jonas Bjorkman, Todd Martin, Cedric Pioline, Michael Stich, Malivai Washington, Brad Gilbert. When two players have rarely met, their records against these lookalikes fill the gap.