Novak Djokovic's serve once held him back. So he reinvented it to become the GOAT | Acing It

In this episode of Acing It, ESPN's Bill Connelly explores the evolution of Novak Djokovic's serve. Djokovic's average serve once had him stuck behind Roger Federer and Rafael Nadal in the world rankings, but his reinvention of the motion has allowed him to win a record 24 Grand Slam titles and claim his place as the GOAT.

0:00 Intro
0:35 Djokovic's all-around brilliance
1:40 How his serve held him back
2:47 The evolution of his serve motion
3:48 2011: Everything comes together
4:14 The impact of upping serve-hold percentage
4:39 Djokovic's current serve mechanics
5:21 2015: The peak of Djokovic holding serve
5:54 Further study: Ash Barty
6:56 Djokovic's incredible career totals

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