 Complete the following phrase:  Japan began to develop a fierce rivalry with fellow Asian powerhouse Australia, shortly after the latter joined the Asian Football Confederation AFC. The rivalry is regarded as one of Asias biggest football rivalries. The rivalry is a relatively recent one, born from a number of highly competitive matches between the two teams since Australia joined the AFC in 2006. The rivalry began at the 2006 World Cup where the two countries were grouped together, and continued with the two countries meeting regularly in various AFC competitions, such as the 2007 AFC Asian Cup, the 