Originally Posted by Benhur
Similar thing with single year percentages above 90%. In the 16-year period from the beginning of 1974 to the end of 1989, such percentages occurred a total of 13 separate times -- almost every year. Then there is a 14 year hiatus until Federer does it again in 04, 05 and 06. Then Djokovic in 2011.
A small qualification on the bolded part. It actually happened a total of 14 times (not 13) but two of those instances were in the same year (1977, Vilas and Borg) so it's still 13 separate years. As far as I know that was the only year in the open era when more than one player had percentages above 90 for the year.