Police arrested 23 Brazilians and one Australian on Sunday in Munich, where the South American side secured a place in the World Cup's last 16 by beating the Socceroos 2-0.

Police said they made a total of 51 arrests during the day, mainly for theft and trading offences but that fans had generally behaved well.

"The Munich police are very happy with the way the day has gone," the Munich police headquarters said in a statement.