agassi will never be considered the GOAT (and he shouldnt) but id rather have his career than Sampras' or Federer's (at the moment). seems more fun and covers more ground.
-only men's player in history to have the Golden Slam (won the Australian Open, French Open, Wimbledon, US OPEN, Olympics)........this is the biggest thing he has on all of the GOAT candidates.
-ranked in the top 10 in 3 different decades
-oldest #1 player in history