Germany produced the best display of the World Cup so far as they hammered Australia 4-0 to go top of Group D and emerge as serious title contenders on Sunday.
Two goals in each half from Lukas Podolski, Miroslav Klose, Thomas Mueller and substitute Cacau were the deserved reward for 90 minutes of fluent, attacking football which left the Socceroos floundering.
Australia finished with 10 men after forward Tim Cahill was sent off in the 56th minute for a foul on Bastian Schweinsteiger with the score at 2-0. It was the fourth sending off in the tournament's eight games and the first straight red.
Ghana beat Serbia 1-0 in Pretoria in the other Group D match of the day.