On Wednesday, former player and current tennis commentator John McEnroe compared Novak Djokovic's family life to that of golfer Tiger Woods and suggested that Djokovic may have "had some off-court issues with the family." 

On Thursday Djokovic responded, per Arash Markazi of ESPN.com:

"Yeah, I have heard about it today. Look, you know, John has a complete right to say—anybody, really, in the world—has a right to say what they want, and I respect that right. Especially coming from John, because he's someone that has earned that right because of who he is and what he has meant to the sport and what he still is representing as a former player and still being very active on the tour.

"He's very well-known for his kind of bold comments and not really caring too much about being politically correct, but saying whatever is on his mind. That's all I can say. I really don't take anything personal."

On Wednesday, McEnroe seemed to suggest that some sort of off-court issues might be affecting Djokovic's play this season.

"The person that comes to mind immediately with Novak is not a tennis player, it's actually a golfer: Tiger Woods," McEnroe said, per Markazi. "... [Woods] had the issues with his wife, and then he seemed to go completely off the rails and has never been even close to being the same player. So we're starting to say: 'Wait a minute, is this possible with [Djokovic]?'"

Woods infamously had a very public falling-out with his former wife, Elin Nordegren, which included a scandal rife with mistresses and infidelity. 

Djokovic was a bit perplexed as to why McEnroe would compare him to Woods, however:

"I don't know where was the basis or if he was just maybe making a comparison. I'm not really sure. When I was warming up for my first match on the Centre Court [on Tuesday], he was giving an intro, talking to the camera, and I served and the serve went straight at him as I was playing.

"I don't know. Maybe it's because of that. Maybe he thought it wasn't a joke, and I was joking; I was trying to hit him. I don't know. I take it very lightly. I don't think there was any kind of really wrong intention from his side towards me."

It is fair to question just why Djokovic has seemingly struggled of late, however. He lost in the quarterfinals of the French Open and the second round of the Australian Open this year and in the third round of Wimbledon last year and has just one singles title this season. 

In May 2017 he parted company with his former coaching staff, perhaps a factor in his struggles, though he has since added former player Andre Agassi to be his new coach and Mario Ancic to be a part of his staff. 

"He (Agassi) has noticed that my game has kind of raised the level and quality of tennis, is going in the right direction every match, and the competitive spirit and fighting spirit was there," Djokovic said prior to Wimbledon, per the Associated Press (via Tennis.com).

"I have been in the game long enough to know what I need to do," he added. "Playing at Wimbledon and playing at any other tournament, as a matter of fact, gives me a lot of joy, and I think that's the key."