One of the most decorated male tennis players in the history of the game, 37-year-old Serbian Novak Djokovic has been on a gold-winning spree for the last couple of years. Be it the Australian Open, Wimbledon or any other major tennis tournament, he has performed exceptionally well. Djokovic has always highlighted the fact that the source of his unyielding determination is his Christian faith, which always gives him strength to overcome the hardest challenges on the court.