Coach Patrick Mouratoglou thinks Novak Djokovic could play at least three to four more years and win up to 30 Grand Slams. Djokovic, 34, is still one of the best physically prepared players on the ATP Tour. “Until this last Australian Open, Novak was by far in a pole position.He is the youngest of the three, he won an average of two Grand Slam titles per year over the last four seasons. He can easily play three to four more years as he is in a great physical condition. That could take him to 25 or 30 Grand Slam titles,” Mouratoglou said.Mouratoglou on the GOAT race Rafael Nadal owns the all-time Grand Slam with 21 Majors, while Djo …