RallyIQ

Game plan

Marcelo Rios v David Goffin

Every number combines what Marcelo Rios does well with what David Goffin allows, each measured against the tour average and shrunk toward it when the sample is thin. Flip perspective

Forecast

Marcelo Rios wins, best of 3 70%90%: 50%–85% · best of 5: 74%
Serve points won 63.1% / 59.1% Marcelo / David · tour 63.8%
Strengths only, no similarity priors 70%serve 63.1% / 59.1%

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 At least one of them is no longer active or has too little charted in the last three seasons, so both are compared on their careers.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 Marcelo Rios's record against David Goffin'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

CareerMarceloDavid
Direction choice+0.13 ±0.05
better than 87%
+0.20 ±0.05
better than 94%
Shot selection−0.23 ±0.19
better than 28%
+0.25 ±0.08
better than 76%
Execution−0.40 ±0.62
better than 48%
−0.15 ±0.26
better than 60%
Points left on the table2.60 ±0.15
lower than 50%
2.15 ±0.08
lower than 96%

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.

Marcelo Rios serving

Deuce court

1st serveNowMarcelo winsv DavidMatchupOptimal
Wide46%67%70%64.6%±5.439% ▼
Body6%65%49%50.1%±11.80% ▼
T48%72%74%70.7%±5.161% ▲

Optimal v David Goffin: +0.9±0.6 per 100 first serves (faults included) over the current mix. Serving T every time would read +4.0 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowMarcelo winsv DavidMatchupOptimal
Wide62%70%72%69.3%±4.757% ▼
Body8%65%64%66.4%±10.30% ▼
T30%75%72%75.3%±6.043% ▲

Optimal v David Goffin: +0.6±0.7 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +4.4 per 100 first serves in before the returner adjusts.

David Goffin serving

Deuce court

1st serveNowDavid winsv MarceloMatchupOptimal
Wide44%71%68%66.2%±4.952% ▲
Body6%63%66%66.1%±9.611% ▲
T50%76%75%76.3%±5.037% ▼

Optimal v Marcelo Rios: +0.2±0.6 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving T every time would read +5.0 per 100 first serves in before the returner adjusts.

Ad court

1st serveNowDavid winsv MarceloMatchupOptimal
Wide53%71%72%70.1%±5.653%
Body7%62%66%65.0%±9.320% ▲
T40%65%69%62.0%±6.027% ▼

Optimal v Marcelo Rios: +0.3±0.8 per 100 first serves (faults included) over the current mix, inside the 90% margin. Serving wide every time would read +3.6 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.

Marcelo Rios returning

1st serve to the forehand

ReturnNowTourOwnv DavidValue
FH through the middle45%+4.3−2.6+1.0+2.6±2.2
FH crosscourt30%+5.5−0.1−0.2+5.2±3.8
FH down the line21%+1.7−3.6+2.8+0.9±3.9
FH slice through the middle2%−4.2+0.1+0.4−3.7±1.8
FH slice crosscourt2%−4.3+0.6+1.4−2.3±2.3

Lean FH crosscourt: +2.4±2.9 per 100 returns v the current mix (327 returns charted, inside the 90% margin)

1st serve to the backhand

ReturnNowTourOwnv DavidValue
BH through the middle33%+6.4−2.5+0.1+4.0±2.0
BH down the line20%+4.2+0.1+3.0+7.3±3.9
BH crosscourt20%+8.8−2.5−0.3+6.0±3.2
BH slice through the middle15%−4.2+0.4+0.4−3.4±2.1
BH slice down the line7%−8.4+1.0−1.4−8.8±3.2

Lean BH down the line: +4.4±3.2 per 100 returns v the current mix (493 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv DavidValue
FH crosscourt50%−0.2+1.1+1.5+2.3±3.9
FH through the middle35%−3.5−0.6+0.7−3.3±2.4
FH down the line15%−1.8−0.3+1.5−0.6±4.0

Lean FH crosscourt: +2.4±2.2 per 100 returns v the current mix (147 returns charted)

2nd serve to the backhand

ReturnNowTourOwnv DavidValue
BH through the middle33%−2.9+1.2+1.6−0.1±1.9
BH down the line32%−0.2+1.8−0.3+1.3±3.8
BH crosscourt26%+1.0+1.3+0.7+3.0±2.8
FH inside-in2%+0.6+0.9+1.5+2.9±3.2
FH inside-out2%+1.0+1.1+1.5+3.6±2.7

Lean BH crosscourt: +2.0±2.5 per 100 returns v the current mix (356 returns charted, inside the 90% margin)

David Goffin returning

1st serve to the forehand

ReturnNowTourOwnv MarceloValue
FH through the middle52%+4.3+0.9−1.0+4.1±2.2
FH crosscourt22%+5.5+2.3+1.5+9.3±3.6
FH down the line21%+1.7−1.2−1.3−0.8±3.9
FH slice through the middle2%−4.2−1.5−1.0−6.7±2.3
FH slice down the line1%−4.3−2.6−0.9−7.8±2.4

Lean FH crosscourt: +5.6±3.2 per 100 returns v the current mix (1354 returns charted)

1st serve to the backhand

ReturnNowTourOwnv MarceloValue
BH through the middle37%+6.4−0.9−1.2+4.2±2.0
BH crosscourt29%+8.8−0.5−0.3+8.0±2.9
BH slice through the middle12%−4.2−2.7+2.0−4.9±2.2
BH down the line11%+4.2−1.4−2.5+0.4±4.4
BH slice crosscourt7%+0.5−2.8+1.9−0.4±2.9

Lean BH crosscourt: +5.2±2.3 per 100 returns v the current mix (1299 returns charted)

2nd serve to the forehand

ReturnNowTourOwnv MarceloValue
FH through the middle52%−3.5+1.3−0.2−2.3±2.5
FH crosscourt34%−0.2+4.2±0.0+4.0±4.0
FH down the line14%−1.8−0.6−5.3−7.7±4.7

Lean FH crosscourt: +4.9±3.0 per 100 returns v the current mix (315 returns charted)

2nd serve to the backhand

ReturnNowTourOwnv MarceloValue
BH crosscourt42%+1.0+0.1−0.2+1.0±2.6
BH through the middle38%−2.9+0.8+0.9−1.2±2.0
BH down the line15%−0.2−1.4−1.5−3.1±4.7
BH slice through the middle1%−11.3−0.7+3.0−9.0±2.2
BH slice crosscourt1%−4.0−0.3+0.5−3.8±2.3

Lean BH crosscourt: +1.7±1.9 per 100 returns v the current mix (978 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.

Marcelo Rios

Favour

ShotEdgeOwnTheirs
FH to their forehand · return+5.2±5.1+2.3+2.8
BH to their forehand · return+5.0±4.7+5.0±0.0
BH to their forehand · return +1+3.7±5.4+1.1+2.5
BH to the middle · serve +1+2.6±3.1+0.5+2.1
FH to the middle · serve +1+2.3±3.2+1.8+0.5
FH to the middle · return +1+1.9±3.4+0.4+1.5

Avoid

ShotEdgeOwnTheirs
BH to their backhand · return +1−5.7±3.6−5.5−0.2
FH to their forehand · return +1−2.9±4.7−3.6+0.7
BH to their backhand · rally−2.8±2.2−4.3+1.5
BH to their backhand · return−1.2±3.0−1.9+0.7
FH to their backhand · serve +1−1.1±3.3−1.8+0.7

David Goffin

Favour

ShotEdgeOwnTheirs
BH slice to the middle · return +1+4.3±3.4+1.7+2.6
BH slice to their backhand · return +1+3.4±3.6−0.3+3.7
BH slice to the middle · return+1.8±3.0−1.3+3.1
FH to the middle · serve +1+1.5±3.2+1.6−0.2
BH slice to the middle · rally+1.5±2.7+0.7+0.8
BH to the middle · serve +1+1.3±3.1+0.2+1.2

Avoid

ShotEdgeOwnTheirs
BH to their forehand · return +1−6.8±5.9−3.3−3.4
FH to their forehand · return +1−5.0±4.9+0.9−5.9
BH to their backhand · return−4.0±3.6±0.0−4.0
FH to their forehand · return−4.0±5.4+2.1−6.1
BH slice to their backhand · rally−3.9±2.6−1.2−2.7

Against David Goffin-like opponents

Marcelo Rios vMatchesServe pts wonReturn pts won
All charted opponents–63.6%39.0%

Similar by tactical fingerprint: Learner Tien, Andrey Rublev, Sebastian Korda, Jack Draper, Laslo Djere, Sebastian Ofner, Borna Coric, Dominic Thiem, Kyle Edmund, Nicolas Almagro. When two players have rarely met, their records against these lookalikes fill the gap.