World Champions Australia will take on Rio Olympic Champions Argentina in the summit clash of the World Hockey League Final tournament today. In the second semi-final at Bhubaneswar last night, Australia defeated World No. 5 Germany by a margin of three goals to Nil. Earlier, in the play off match for the fifth and sixth places, Rio Olympic Silver medalists Belgium defeated Spain by a solitary goal. While Belgium got the 5th spot, Spain settled for the 6th position.Hosts India will take on Germany today for the Bronze medal.