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Matchup preview

Duke vs Illinois

Duke visit Illinois in Week 2. The model favors Illinois by 6.5. Win probability, the tale of the tape, and the all-time series, all from real data.

Win probability
35%
65%

Model win probability from SP+ ratings + home-field edge.

The read
Model analysis · September 9 · refreshed weekly

SP+ separates these teams by less than a point, rating Illinois 7.5 (42nd) against Duke 6.6 (45th), and the model turns that edge into a 58-42 lean with a projected Illinois margin of 3.3. The market is more committed to the home side: the consensus line sits at Illinois -5.7 with an implied 64-36 split, and the ProphetX exchange goes further still at Illinois -210 (68%) versus Duke +198 (34%). That is a roughly 10-point probability gap between model and exchange, framing Duke as the value side for anyone trading the rating.

The unit profile reinforces how thin the divide is. Both offenses rank 34th, and the defenses sit close together, Illinois 60th and Duke 63rd, so neither side owns a clear structural advantage. Series history is the outlier: Duke is 0-1 against Illinois, having lost the 2025 meeting 45-19. Early results give both teams a win, Duke shutting down Tulane 17-3 and Illinois handling UAB 42-23, a higher-scoring showing that fits the 51.5 total.

The season simulations tilt the other way. Across 10,000 runs Duke projects to 7.2 wins with a 4.9% Playoff chance, ahead of Illinois at 6.3 wins and 3.4%, while both carry 0.1% title equity and Illinois draws just 0.7% in the market. The single-game price favors Illinois; the broader outlook quietly prefers Duke.

The model calls it a coin flip leaning Illinois by 3.3, but the market and exchange price the home side far harder, leaving Duke as the value.

Matchup odds
Consensus line · 3 books
Spread
ILL -6.3
Total (O/U)
51.5
Favorite
ILL
Moneyline win probability (implied from the spread)
Duke
35%

Real consensus line across 3 sportsbooks. Spread and total are the current market number; the win probabilities are implied from the spread.

Matchup odds price history
The market to win this game · daily prices, colored by the favorite
Duke99%+89 ptsvsIllinois1%-89 pts
0%25%50%75%100%Duke favoredIllinois favoredAug 27Sep 1Sep 5Sep 8Sep 11Sep 13

Real daily prices from the market to win this game, shown as Duke's win price; Illinois's is 100 minus it (the same market's other side). Above the 50% line Duke is favored, below it Illinois is, and each candle takes the favored team's color. Kalshi shows open-high-low-close candles (filled body closed up, hollow closed down). As of Sep 23.

Tale of the tape
Percentile vs FBS · 2025 stats, 2026 SP+
#46SP+SP+: Bill Connelly's tempo- and opponent-adjusted efficiency rating, expressed in points above average.#33
#43FPIFPI: ESPN's Football Power Index, an overall measure of team strength.#30
1622EloElo: a rating that rises or falls after each game based on the result and the quality of the opponent.1595
-Title oddsDe-vigged consensus probability to win the national title, averaged across the prediction markets we track.0.8%
DukeIllinoissolid = better, faded = trailing
What these metrics mean
SP+. SP+: Bill Connelly's tempo- and opponent-adjusted efficiency rating, expressed in points above average.
FPI. FPI: ESPN's Football Power Index, an overall measure of team strength.
Elo. Elo: a rating that rises or falls after each game based on the result and the quality of the opponent.
Title odds. De-vigged consensus probability to win the national title, averaged across the prediction markets we track.
Off PPA. PPA (Predicted Points Added): the average point value each play adds. Higher is better for offense, lower for defense.
Success. Success rate: the share of plays that stay on schedule (roughly 50% of needed yards on 1st down, 70% on 2nd, 100% on 3rd/4th). Higher is better.
Explosive. Explosiveness: the average value of a team's successful plays, i.e. how big its good plays are when they hit.
Yards/game. Total yards gained per game.
Success allowed. How often the defense allows an on-schedule play (enough yards for the down). Lower is better.
Havoc. Havoc rate: the share of plays where the defense makes a tackle for loss, forced fumble, interception, or pass breakup.
Yards allowed. Total yards allowed per game. Lower is better.
Efficiency profile
Percentile vs FBS · 2025
Recent series
Illinois lead 1-0
20252025
Head to head
Every meeting in our records
2025
45-19
Illinois
at Duke
More Week 2 matchups
Model previews for the rest of the slate
FAQ

Frequently asked questions

How do I trade the Duke vs Illinois game?

Kalshi lists winner markets for college football games. Sign up with code FADE (trade $25, get up to $500), open the Duke vs Illinois market when it posts, and buy YES on your side; the price in cents equals the market's implied win probability. You can sell before kickoff or settlement at the current price.

When do Duke and Illinois play?

Week 2 of 2026, on Sep 12, 2026 at Illinois.

Who is favored?

The model projects Illinois by 6.5 (65% win probability), from SP+ ratings.

What is the all-time series?

Illinois lead 1-0 over the meetings in our records.

Full schedule → · Both teams' playoff odds, from 10,000 simulations →

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