Former world No. 1 Martina Navratilova dropped a big praise on Carlos Alcaraz, calling the 19-year-old Spaniard “a better version of Novak Djokovic.” Djokovic is one of the greatest players in tennis history, while Alcaraz is one of the most exciting prospects in a long time. Alcaraz, who turned 19 this week, won a Masters and reached the top-10 as an 18-year-old. The general expectation is that Alcaraz will win multiple Grand Slams and reach the world No. 1 ranking. Some even think Alcaraz could potentially reach the Grand Slam mark set by the Big Three. “F …