Just how Djokovic started winning decent titles when his opponents declined.
define 'decent titles'? Djokovic (barely 20yo) did beat prime Fed and Nadal in 2007 and won his first GS in 2008. Please, with all respect, don't lecture us about tennis history.
The first tennis match I've seen (dad just purchased a new colour TV
) was JMac/Borg final at Wimbledon back in 1980.