Can you answer these questions posed by Sportsman Rehman to sisters and brothers of cricket section?

Question

Good evenings my sisters and brothers from the cricket section,

First question how have you all been this week? Hope this weekend will be restful for you. Please let me know what is going on with your lives.

I return in a new and dynamic form: "Sportsman Rehman". It is the same Rehman now sporting a sportscap. More details on Sportsman Rehman can be obtained by clicking my icon. And a bigger picture can be seen in my blog.

This evening sisters and brothers I come with a question and a request. Question:

1. What are the teams that have been the toughest rivals for Australia this last 4 decades, including this decade?

2. What are the teams that have been the toughest rivals for West Indies this last 4 decades, including this decade?

Please split your answer by decade if it helps to simplify.

Now, my other question, I discovered some good cricket songs that I have put in my blog.

http://rehmanofmultan.blogspot.com/2008/06/cricket-songs.html

My other questions are:

Answer 1

Thsi is very hard to answer, you are asking about some 40 years ago -- Decade means 10 years...