When Sampras set the slam record at 14, Federer's goal is to surpass him by winning 15 slams. Federer successfully met his goal in 2009 Wimbledon by breaking his record before his 28th birthday. Of course he still had motivation/drive but it was not nearly the same since the pressure was off his back. Let say that Pete set a record at 20 and Federer's goal was to break 20 instead of 14, I believe Federer would be more determine/focus and thus would have won a lot more slams when he was 28 years old. With a goal set in mind down the line, he would have won at around 23-25 slams at the age of 35.
Djokodal has an advantage because their goal/target is 21 instead of 15, so the motivation/drive remains the at constant level until their goal is met. Unlike Federer's level was drastically decrease because he met his goal before turning 28.
Djokodal has an advantage because their goal/target is 21 instead of 15, so the motivation/drive remains the at constant level until their goal is met. Unlike Federer's level was drastically decrease because he met his goal before turning 28.