5 qualities which made Roger Federer the greatest tennis player

#2 Ability to elevate the quality of his serve at crucial moments

Federer's outstanding serve

Federer is not a big server like Goran Ivanisevic or John Isner, nor does he possess a serve as perfect as Pete Sampras's either. He has the ability to elevate the quality of his serve according to the demand of the situation.

An example could be the match against Marin Cilic in the Final of Australian Open 2018. In the 4th set, Cilic broke Federer’s serve twice to win the set and make it 2-2. Federer's first serve percentage dropped to a meager 36% in the 4th set. However, in the 5th set, Federer took his serve to another level and did not give Cilic the slightest chance of causing a break. His first serve percentage rose to 61% in the 5th set. As a result, he comfortably took the set and won the match.

Federer has a career first serve ratio of 62%. He has also been able to save 67% break points off his serve. Moreover, he is second only to Ivo Karlovic in the all-time list for hitting aces. Those records show that like a true champion, Federer possesses the inherent quality of being able to improve his game when the situation calls for it.