iMihai
senior
The basis for this list was how much the players were creative in the time they played in and how well they serve compared to their playing level. For example, before Waldner made it to his first wttc final in 1987 there were many players including Kim taek soo who only served backhand serves before they saw how far Waldner made it with his forehand serves.
https://www.youtube.com/watch?v=rRIxKJm6xw8
https://www.youtube.com/watch?v=rRIxKJm6xw8