WIMBLEDON, England—Even with a chance to complete a so-called “Golden Slam,” Novak Djokovic isn’t sure he’ll be playing at the Tokyo Olympics. The lack of fans and the tight coronavirus restrictions in Tokyo means Djokovic remains on the fence about traveling to Japan. “I’ll have to think about it,” Djokovic said after winning Wimbledon on Sunday. “My plan was always to go to Olympic Games. But right now I’m a little bit divided. It’s kind of 50–50 because of what I heard in the last couple days.” That includes the news that there won’t be fans in the stands. And that the tight restrictions will mean he can only bring a limited number of people as part of his personal team. “That was really disappointing to hear,” Djokovic said. Rafael Nadal has already said he will not be playing in Tokyo, while Roger Federer has not yet made a decision. …