Title holders Germany are without a victory from four outings, drawing three and losing one. This puts them out of contention from the title encounter.
Britain stay in the hunt for the second spot in the final with five points from four matches and need to win the last fixture against Belgium tomorrow to stay in contention.
World No. 1 Australia boosted their points tally to 10 from four matches to ensure that they would feature in the title showdown irrespective of any result in other matches.
Open play goals from Glenn Turner in the 38th minute and Tristan White in the 49th gave Australia the upper hand against the Belgians, who tried to put up a good contest but suffered from poor shooting.
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Australia, winners of the Champions Trophy for a record 13 times, take on India in their last round-robin league fixture tomorrow. That match is extremely important for India, who are on seven points from four outings.
Germany today took the lead through a penalty corner goal by Tobias Hauke, who made good use of a rebound from the goalkeeper in the 29th minute.