RallyIQ

Game plan

Michael Chang v Marat Safin

Every number combines what Michael Chang does well with what Marat Safin allows, each measured against the tour average and shrunk toward it when the sample is thin. Flip perspective

Forecast

Michael Chang wins, best of 3 22%90%: 8%–44% · best of 5: 16%
Serve points won 59.4% / 65.6% Michael / Marat · tour 63.4%
Strengths only, no similarity priors 22%serve 59.4% / 65.6%

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 At least one of them is no longer active or has too little charted in the last three seasons, so both are compared on their careers.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 Michael Chang's record against Marat Safin's tactical lookalikes and in their charted head-to-heads. 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

CareerMichaelMarat
Direction choice−0.01 ±0.13
better than 54%
+0.12 ±0.04
better than 84%
Shot selection−0.02 ±0.19
better than 49%
−0.07 ±0.10
better than 44%
Execution+1.06 ±0.36
better than 96%
−0.19 ±0.22
better than 58%
Points left on the table2.88 ±0.27
lower than 26%
2.39 ±0.07
lower than 74%

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.

Michael Chang serving

Deuce court

1st serveNowMichael winsv MaratMatchupOptimal
Wide41%65%72%63.8%±4.147% ▲
Body8%56%64%56.6%±8.30% ▼
T50%69%75%68.8%±4.153% ▲

Optimal v Marat Safin: +0.1±0.4 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.

Ad court

1st serveNowMichael winsv MaratMatchupOptimal
Wide48%65%71%63.9%±4.161% ▲
Body7%59%65%60.8%±8.98%
T44%63%73%64.6%±4.631% ▼

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

Marat Safin serving

Deuce court

1st serveNowMarat winsv MichaelMatchupOptimal
Wide36%76%75%78.3%±3.530% ▼
Body7%67%59%62.9%±7.70% ▼
T57%77%79%80.9%±3.470% ▲

Optimal v Michael Chang: +0.6±0.5 per 100 first serves (faults included) over the current mix. Serving T every time would read +2.2 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowMarat winsv MichaelMatchupOptimal
Wide53%74%67%68.8%±4.040% ▼
Body6%73%62%72.7%±7.56%
T41%75%74%76.5%±4.054% ▲

Optimal v Michael Chang: +0.5±0.5 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +4.3 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.

Michael Chang returning

1st serve to the forehand

ReturnNowTourOwnv MaratValue
FH through the middle53%+4.3+1.7−1.6+4.4±1.8
FH down the line29%+1.7+2.6−4.0+0.3±3.4
FH crosscourt17%+5.5−2.6−3.1−0.2±3.7
BH through the middle1%+6.6+0.4−1.7+5.2±1.7

Lean FH through the middle: +2.0±1.5 per 100 returns v the current mix (676 returns charted)

1st serve to the backhand

ReturnNowTourOwnv MaratValue
BH through the middle44%+6.4−2.4−1.7+2.3±1.8
BH crosscourt32%+8.8+5.1−3.5+10.5±2.6
BH down the line12%+4.2+4.0−3.0+5.2±4.2
BH slice through the middle6%−4.2−0.9+1.0−4.0±2.1
BH slice crosscourt4%+0.5+2.1±0.0+2.6±2.6

Lean BH crosscourt: +5.8±2.0 per 100 returns v the current mix (718 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv MaratValue
FH through the middle47%−3.5+1.7+0.1−1.7±2.2
FH down the line26%−1.8+0.9−0.6−1.5±4.1
FH crosscourt26%−0.2+1.4+0.4+1.6±3.8
BH inside-in2%+2.5−0.4−0.5+1.6±2.0

Lean FH crosscourt: +2.3±3.2 per 100 returns v the current mix (286 returns charted, inside the 90% margin)

2nd serve to the backhand

ReturnNowTourOwnv MaratValue
BH crosscourt50%+1.0+1.5−0.5+2.0±2.1
BH through the middle35%−2.9+1.0+0.3−1.6±1.8
BH down the line12%−0.2+3.9−2.4+1.3±4.5
FH through the middle2%−2.9−1.0+0.1−3.8±1.6
FH inside-out1%+1.0+0.4−0.6+0.8±2.6

Lean BH crosscourt: +1.5±1.3 per 100 returns v the current mix (486 returns charted)

Marat Safin returning

1st serve to the forehand

ReturnNowTourOwnv MichaelValue
FH through the middle45%+4.3−1.5+1.2+4.0±1.7
FH down the line22%+1.7+1.4+2.7+5.8±3.1
FH crosscourt22%+5.5−2.1+4.4+7.8±3.1
FH slice through the middle5%−4.2+0.7+2.7−0.8±2.3
FH slice down the line2%−4.3−0.1+0.9−3.4±2.9

Lean FH crosscourt: +3.1±2.7 per 100 returns v the current mix (1806 returns charted)

1st serve to the backhand

ReturnNowTourOwnv MichaelValue
BH crosscourt34%+8.8−0.6+2.4+10.6±2.5
BH through the middle34%+6.4−0.5−0.1+5.9±1.9
BH slice through the middle11%−4.2−3.7+5.0−2.9±1.9
BH down the line11%+4.2+0.1+2.0+6.3±4.2
BH slice crosscourt6%+0.5−5.2+5.7+1.0±2.6

Lean BH crosscourt: +4.9±1.8 per 100 returns v the current mix (1839 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv MichaelValue
FH through the middle47%−3.5+1.6+2.5+0.7±2.1
FH crosscourt27%−0.2±0.0+1.6+1.4±3.5
FH down the line23%−1.8−0.8+2.4−0.2±3.7
BH inside-in2%+2.5−2.6+0.4+0.3±2.9
BH through the middle2%+0.1+1.0+2.2+3.3±1.8

Lean FH crosscourt: +0.7±2.9 per 100 returns v the current mix (678 returns charted, inside the 90% margin)

2nd serve to the backhand

ReturnNowTourOwnv MichaelValue
BH crosscourt49%+1.0−0.4+0.4+1.0±2.2
BH through the middle37%−2.9−0.6+2.2−1.4±1.9
BH down the line12%−0.2+1.7+0.4+1.9±4.6
BH slice through the middle1%−11.3−0.4+3.4−8.3±2.2
BH slice crosscourt0%−4.0+0.4+3.0−0.6±2.0

Lean BH down the line: +1.8±4.3 per 100 returns v the current mix (1511 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.

Michael Chang

Favour

ShotEdgeOwnTheirs
BH volley to their backhand · rally+3.6±5.5+3.0+0.5
FH to the middle · serve +1+3.4±1.8+2.3+1.1
BH lob to the middle · rally+2.9±3.1+2.5+0.4
FH to their backhand · serve +1+2.7±1.9+1.9+0.8
FH to their forehand · return +1+2.7±2.8+2.7±0.0
BH to the middle · serve +1+2.7±1.7+1.4+1.3

Avoid

ShotEdgeOwnTheirs
Smash to their forehand · rally−5.7±4.3−2.5−3.2
FH to their forehand · return−3.5±3.0−1.6−1.9
BH to the middle · return−2.1±1.2−0.6−1.6
FH to their forehand · serve +1−2.1±2.2−0.7−1.4
FH to their backhand · return +1−1.7±2.9+0.6−2.3

Marat Safin

Favour

ShotEdgeOwnTheirs
BH volley to their backhand · rally+3.4±4.9−0.8+4.2
FH to their backhand · serve +1+3.1±2.3−1.0+4.1
FH to their forehand · return+2.4±2.6−0.1+2.5
BH to their forehand · serve +1+2.1±3.6+0.3+1.8
BH slice to the middle · return +1+2.0±2.3−1.0+3.0
BH slice to the middle · return+1.8±1.8−3.1+4.9

Avoid

ShotEdgeOwnTheirs
BH volley to their forehand · rally−4.7±5.1−6.2+1.5
BH to their forehand · return +1−4.2±3.9−1.8−2.4
FH volley to their backhand · rally−3.0±5.1−0.7−2.3
FH volley to their forehand · rally−2.4±4.7−4.0+1.6
Smash to their backhand · rally−2.4±4.6−2.5+0.1

Against Marat Safin-like opponents

Michael Chang vMatchesServe pts wonReturn pts won
All charted opponents–59.2%35.1%

Similar by tactical fingerprint: Sebastian Korda, Jack Draper, Borna Coric, David Goffin, Viktor Troicki, Janko Tipsarevic, Marcos Baghdatis, Nicolas Almagro, David Nalbandian, Gustavo Kuerten. When two players have rarely met, their records against these lookalikes fill the gap.