Us Open NY, U.S.A. Hard Grand Slam Round of 128

Grigor Dimitrov vs Alexei Popyrin: AI Prediction | Games, Spread, Aces & Double Faults

Grigor Dimitrov

Rank: #137
54%
VS

Alexei Popyrin

Rank: #130
46%
Expected Total Games: 37.7
Predicted Winner: Grigor Dimitrov

Why the Model Favors Grigor Dimitrov

The factors that drove this prediction, measured in win-probability points.

Surface fit +3.0 Grigor Dimitrov
Recent form +2.9 Grigor Dimitrov
Age +2.8 Alexei Popyrin
Serve & return game +1.4 Grigor Dimitrov
Fatigue & recent workload +0.8 Alexei Popyrin

Starting from an even matchup, these factors move the model to 54% for Grigor Dimitrov. Computed with gradient-based attribution on our neural network, not editorial opinion. How to read this →

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Player Metrics

Grigor Dimitrov

Form Index: 54.5
ELO Rating: 1676.8
Glicko2 Rating: 1646.2
Current Fatigue (minutes): 348.0
Surface Strength:
Hard: 23.6
Clay: 12.8
Grass: 25.8
Serve Rating: 95.8
Return Rating: 88.0

Alexei Popyrin

Form Index: 35.8
ELO Rating: 1590.9
Glicko2 Rating: 1633.9
Current Fatigue (minutes): 0.0
Surface Strength:
Hard: 15.6
Clay: 24.7
Grass: 4.3
Serve Rating: 96.3
Return Rating: 82.7

Recent Matches

Grigor Dimitrov

Alexei Popyrin

Head-to-Head (Last 2 Seasons)

0
Grigor Dimitrov
vs
0
Alexei Popyrin
Hard
0 - 0
Clay
0 - 0
Grass
0 - 0

Key Prediction Insights

At the 2026 US Open in New York, first round action on hard courts pits Grigor Dimitrov against Alexei Popyrin. The model favors Dimitrov to progress, with a 53.53% chance to win versus 46.47% for Popyrin. The match is expected to contain about 37.7 games.

Match Analysis

The model's edge for Dimitrov comes mainly from surface fit (+3.0 points) and recent form (+2.9 points), with serve and return contribution also nudging the forecast toward him. Dimitrov posts a higher Elo at 1676.8 versus Popyrin at 1590.9, and his form index is substantially stronger at 54.52 compared with Popyrin's 35.85. Dimitrov's surface strength index of 23.62 eclipses Popyrin's 15.64, reinforcing the model's surface fit advantage on hard courts. Age moves the needle 2.8 points toward Popyrin according to the model. Fatigue is also a factor. Dimitrov arrives with 348 minutes played so far in the tournament, while Popyrin shows zero minutes. That cumulative workload favors Popyrin by 0.8 points in the model. Both players bring big serves. Their mean serve indices are almost identical, 95.76 for Dimitrov and 96.27 for Popyrin, so there is no large serve gap. Dimitrov does have a stronger mean return index at 87.98 versus Popyrin at 82.72, a difference of about 5.3 points, which helps explain his slight edge. Recent form narratives track this. Dimitrov has won his two opening US Open matches, both long affairs, after a loss in Cincinnati. Popyrin has struggled recently with two straight losses in Cincinnati and Toronto after a prior win in Toronto.

Total Games Predictions

🎾
Expected Total Games in Match 37.7 Most likely outcome: 36 games

📊 Total Games Probability Distribution

Distribution

Probability of each total games outcome

Probability distribution chart for total games in Grigor Dimitrov versus Alexei Popyrin. The X-axis shows possible total games values and the Y-axis shows the predicted probability percentage for each outcome.
Cumulative Probability (CDF)

Probability of total games ≤ X

Cumulative distribution function chart for total games in Grigor Dimitrov versus Alexei Popyrin. The curve rises from 0% to 100%, showing the cumulative probability for each games total threshold.

Games Spread Predictions

📈
Expected Games Spread (Grigor Dimitrov - Alexei Popyrin) +0.5 Most likely spread: 0 (even number of games won)

📊 Games Spread Probability Distribution

Distribution

Probability of each games spread outcome

Probability distribution chart for games spread in Grigor Dimitrov versus Alexei Popyrin. Positive values indicate Grigor Dimitrov winning more games, negative values indicate Alexei Popyrin winning more games.
Cumulative Probability (CDF)

Probability of spread ≤ X

Cumulative distribution function chart for games spread in Grigor Dimitrov versus Alexei Popyrin. The curve shows the cumulative probability for each spread threshold.

Aces and Double Faults Predictions

The aces prediction calls for 20.68 total aces in the match, with predicted aces of 10.26 for Dimitrov and 10.94 for Popyrin. The double faults prediction pegs expected double faults at 9.19 total, split as 4.91 for Dimitrov and 4.28 for Popyrin. On a medium paced hard court, these predicted aces are consistent with both players carrying strong servers, while expected double faults reflect some risk under pressure.
🎯
Expected Total Aces 20.7 Most likely: 19 aces Per player: Grigor Dimitrov 10.3 + Alexei Popyrin 10.9
Expected Total Double Faults 9.2 Most likely: 8 double faults Per player: Grigor Dimitrov 4.9 + Alexei Popyrin 4.3

🎯 Aces Probability Distribution

Distribution

Probability of each ace count outcome

Probability distribution chart for total aces in Grigor Dimitrov versus Alexei Popyrin. Higher ace counts are more likely on faster surfaces like grass.
Cumulative Probability (CDF)

Probability of aces ≤ X

Cumulative distribution function chart for total aces in Grigor Dimitrov versus Alexei Popyrin. The curve shows the cumulative probability for each aces threshold.

🎯 Aces by Player

Grigor Dimitrov

Expected 10.3 aces

Probability distribution for the aces Grigor Dimitrov serves in this match.
Alexei Popyrin

Expected 10.9 aces

Probability distribution for the aces Alexei Popyrin serves in this match.

Double Faults Probability Distribution

Distribution

Probability of each double fault count outcome

Probability distribution chart for double faults in Grigor Dimitrov versus Alexei Popyrin. The chart shows the predicted probability for each double-fault count.
Cumulative Probability (CDF)

Probability of double faults ≤ X

Cumulative distribution function chart for double faults in Grigor Dimitrov versus Alexei Popyrin. The curve shows the cumulative probability for each double faults threshold.

Double Faults by Player

Grigor Dimitrov

Expected 4.9 double faults

Probability distribution for the double faults Grigor Dimitrov serves in this match.
Alexei Popyrin

Expected 4.3 double faults

Probability distribution for the double faults Alexei Popyrin serves in this match.

🎯 Match Format Predictions

Tiebreak Likelihood

Probability that any tiebreak is played in this match

52.2% Predicted: Tiebreak likely

Exact Score Distribution BO5

Probability of each set-by-set outcome (Grigor Dimitrov's perspective)

3-0 Most likely set score (21.0%)
Probability distribution of the final set score from Grigor Dimitrov's perspective. Format: BO5.

Final Prediction

Dimitrov's edge is driven chiefly by surface fit and better recent form. Watch his return game and how fatigue from long early matches affects his movement as the key factor that could determine whether the slight prematch advantage holds.

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