Djokovic said in a statement on his website: “I am extremely sorry for each individual case of infection. I hope that it will not complicate anyone’s health situation and that everyone will be fine.
“The moment we arrived in Belgrade we went to be tested. My result is positive, just as Jelena’s, while the results of our children are negative.
“Everything we did in the past month, we did with a pure heart and sincere intentions. Our tournament meant to unite and share a message of solidarity and compassion throughout the region.”
Djokovic added: “The tour has been designed to help both established and up and coming tennis players from southeastern Europe to gain access to some competitive tennis while the various tours are on hold due to the Covid-19 situation.
“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, and it is a new reality that we are still learning to cope and live with.
“I am hoping things will ease with time so we can all resume lives the way they were.”
The ATP Tour season is set to restart on 14 August and the US Open will be held without fans from 31 August to 13 September, despite some players voicing concerns about travelling to New York.