Tamworth FC vs. Sutton United FC: Sutton United FC O/U 0.5

This market settles on Sutton United's goal count against Tamworth: "Under" wins if the visitors fail to score, i.e. their final tally is 0. The 22% price implies the market expects Sutton to score at least once with 78% probability. Our model puts "Under" at 38%.

The key driver is the cup-match context and the gap in divisions. Sutton United play a tier above, but away against a motivated Tamworth side that plays at home and often sits deep, the visitors' scoring output drops. Historically, the share of such matches where the higher-ranked team fails to score is 25-35%, not 20-22%. Our calculation, based on Sutton's expected away goals and Tamworth's style, returns 38%.

For "Under" to win, Sutton simply need to fail to score over 90 minutes - a scenario that materialises in roughly one of every three or four such matches. At a price of 0.22, even a 30% probability yields positive expected value, and our estimate is higher. The market is likely overrating the visitors' attacking potential and underrating the low tempo and defensive setup of the hosts.

The main risks are an early Sutton goal, which breaks the scenario, plus a red card or a penalty in the visitors' favour. In addition, the cup lineup may be rotated, and if Sutton field their strongest attack the probability of a clean sheet against them falls. If a strong visiting lineup is confirmed, the estimate should be revised down.