Novak Djokovic was one of the most dominant players in tennis history.
Then, in 2017, he hit a major slump that threatened his status in tennis.
Now, again, he's poised to dominate.
How did he do it?
Business Insider revealed the steps Novak took to regain his mojo on the court.
Djokovic had to get surgery on an elbow that was giving him trouble.
He changed his serve to focus on efficiency.
He changed the dimensions of his racket, ever so slightly.