Djokovic has long been clear that he does not want to be vaccinated and because of that he was not allowed to play in the Australian Open in Melbourne at the beginning of the year and now he also misses the US Open.

- I think it's stupid and wrong that they don't let him participate.

It's almost a joke.

"We've been living with this pandemic for two and a half years and with that in mind, it's a joke that he's not allowed to participate," McEnroe said.

McEnroe also points out that it affects Djokovic's play when he is not allowed to participate in certain tournaments:

- It is not easy to train without knowing whether you will be able to play matches.

It took Djokovic four months to get back into shape after everything that happened to him in Australia in January.

Archive: This Has Happened - Djokovic Visa Trouble in Australia:

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Serbian tennis star Novak Djokovic.

Photo: Bildbyrån