Originally Posted by DrJules
It happened to Connors, McEnroe, Lendl, Becker, Sampras and Agassi (all won 6 or more GS titles and all I think fell out of the top 10 towards their career end).
You only avoid it if you retire at 25 like Borg in 1981.
Appparently some think it's better to retire at age 25-26 to 'keep/restore your legacy' in stead of staying around as long as possible and making the best out of it.
Such reasoning can only come from 16-year olds - at the max.