Porto enters the 2026-27 Primeira Liga with a narrow edge in the clean sheets market, buoyed by its league-leading defense that has conceded zero goals through the opening three matchweeks and Diogo Costa’s continued excellence in goal. Historical data from the prior campaign, when the Dragons posted 21 shutouts—the highest among Europe’s top leagues—underpins trader confidence in squad continuity and tactical discipline under Francesco Farioli. However, the probabilities remain tightly clustered because several sides, including Académico de Viseu and established defensive units at Braga and Vitória de Guimarães, possess comparable organization and home resilience. Early parity in results, combined with the inherent variability of a full 34-game schedule and potential for organized lower-table sides to secure unexpected clean sheets, keeps the race competitive without a dominant consensus.