Conversation so far:
what occurred regarding ken rosewall in 1972?
From August 1972 players could enter almost all the tournaments they wanted and the real open era began.
what was a tournement he played in?
Rosewall won seven tournaments in 1972.
who was an opponent?
Mark Cox.

Question: he did not defeat any opponents?
Self-contained rewrite: Did Ken Rosewall defeat any opponents in 1972?