Djokovic was the face of the Adria Tour which started off well; but the second event in Zadar saw players hugging and engaging in close contact activities such as basketball.

As well as the World Number One, his wife Jelena has also tested positive, it has also been revealed; but his children have not.

This has courted criticism from the likes of Nick Kyrgios who called the positive tests a show of a 'boneheaded decision' ; he tweeted simply 'Oh boy' when the news was released a short time ago.

'The moment we arrived in Belgrade we went to be tested,' Djokovic said in a statement on his website.

'Everything we did in in the past month we did with a pure heart. Our tournament meant to unite and share a message of solidarity and compassion throughout the region.

'It was all born with a philanthropic idea, to direct all raised funds towards people in need and it warmed my heart to see how everybody strongly responded to this. We organised the tournament at the moment when the virus has weakened; believing that the conditions for hosting the tour had been met.

'Unfortunately this virus is still present; it is a new reality that we are still learning to cope and live with.'

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