The top teams in the IRB 7s series have been hit by injuries ahead of the Australia 7s tonight.

After a tough encounter in Hong Kong last week Fiji, South Africa, New Zealand and England are without some key players and have been forced to make changes.

Speaking on IRB.com, defending Adelaide champions, South Africa Coach Paul Treu said the main message for his boys is to focus on the first pool game against the Cook Islands and take it from there.