Hawthorn is the only undefeated team in the competition after four rounds, following their slogging defeat of Melbourne today. Atrocious conditions, some of the worst seen in years, helped to cause upsets at Shell Stadium, where the Roos won their first of the season, and Optus Oval, where the Crows also broke their drought. Freo remain in trouble after losing to neighbours West Coast, while Port, the Bulldogs and the Tigers all won again.