Brighton beat Arsenal 3-0: Three defensive collapses and the Falmer nightmare

Brighton secured a 3-0 win over Arsenal in matchweek 5 of the 2026/27 Premier League, ending the visitors’ perfect start. The hosts pressed from the first minute, created an early chance through Kostoulas, and opened the scoring through Pascal Gross in the 31st minute. Kostoulas added a second before half-time, and Andrés headed a third from a corner. Arsenal’s only notable first-half attempt was a long-range shot from Bruno Guimarães. Mikel Arteta sent on Viktor Gyökeres and Kai Havertz at 0-3; Havertz missed a one-on-one. The three goals came from three different routes, indicating a systemic defensive collapse rather than a single flaw. The match is a narrative shock more than a proven decline, but the set-piece vulnerability and late substitutions are concerning signs. The next three to five matches will reveal whether Arsenal can turn this loss into a turning point.