Derby came to Fratton Park and handed Portsmouth a heavy defeat, running out 2-0 winners in a result that flew firmly in the face of our pre-match forecast. Szmodics opened the scoring in the 16th minute with an assist from Clark, then Salvesen added the second in the 62nd minute after a setup from Fraulo. Portsmouth never got going and Derby, despite their precarious league position, imposed themselves early and held firm.

Our model had flagged a 1-1 draw as the most likely outcome, leaning on strong historical patterns between these sides—six draws in their last eight meetings—and the expectation that Derby's relegation battle would push them toward a point rather than risk-taking at home. The data suggested a cagey affair under 2.5 goals. Derby's win probability sat at 32%, so while a Derby victory was plausible, it wasn't where our model's weight lay. The final result belonged in the lower-probability tail of our forecast.

What actually unfolded was different. Derby came with real intent from the off and converted their early chances with clinical finishing. Portsmouth, meanwhile, couldn't muster the attacking threat we'd anticipated from the home side, leaving them chasing the game long before halftime. This was a case where the pre-match reasoning—the draw-heavy history, the stakes for Derby, the mid-table apathy we'd sensed in Portsmouth—didn't translate into the match itself. Sometimes football hands you a reminder that even sensible frameworks can't account for the day's execution.