Jaroslav Drobny and Kenneth Rosewall compete at Wimbledon

The transcript describes a tennis match where Drobny leads at 5/1 and wins the set 6/2. The match lasts for an hour and 23 games, with Drobny maintaining pressure and eventually winning the match at 9/7. Both players are commended for their performance.

Describe the performance of both players in the championship.

What happened during Rosewall's return that affected the match?