I think Australia is one of the top teams here, they were just unlucky to lose against Turkey and after to play with Spain in the 1/8 finals. Today they will show real face and I am expecting a high win with at least 20 points difference (more real 30).
On the other side Puerto Rico is nothing special, they won only poor Latvia for 4 and lost all other matches. The last loss was against Canada for 30 points difference. This was a match where Canada could win with 40+ but they stopped in the last quarter.
All in all, Australia is a much more quality team and they will show it today on court.