West Ham fell to an early sucker punch at home, with Charlton grabbing the winner inside the opening quarter-hour. Jones struck in the seventh minute after a cutback from Carey, and that proved enough to settle the match. It was a clinical finish from the visitors and, given how the rest of the afternoon unfolded, a decisive one.

Our model had leaned heavily toward a West Ham home win—54% probability, with a projected 2-0 scoreline. That lean made sense on paper: West Ham playing at home with a generally inconsistent but stronger domestic record, up against a Charlton side carrying injury concerns for the trip. We'd weighted a draw higher than usual based on Championship patterns, but the headline call was clear. The match had other ideas. With only a 20% probability attached to a Charlton win, this was a lean against them, not a confident prediction of West Ham dominance. The early goal and solid defensive display from the visitors simply didn't align with what the model had expected beforehand.

Both sides arrived early in the season without meaningful pressure points—neither fighting relegation nor chasing promotion—so motivation was level. The model's miss here feels less like a structural miscalculation and more like the kind of day when a well-drilled opponent catches you cold and doesn't let go. West Ham couldn't find a way through, Charlton held firm, and a single goal proved decisive.