Nick Kyrgios aimed further criticism at Novak Djokovic and those who participated in the Adria Tour after it was revealed the world number one had tested positive for coronavirus.

Djokovic and his wife Jelena returned positive tests in Belgrade and must isolate for 14 days.

The 33-year-old was a driving force behind the creation of the Adria Tour, which took place in Serbia and Croatia in front of large crowds and saw players shaking hands despite concerns over social distancing. 

The final between Djokovic and Andrey Rublev was cancelled when Grigor Dimitrov tested positive for COVID-19.

Borna Coric and Viktor Troicki, who both competed in the tournament, have also contracted the virus.

Kyrgios labelled the decision to go ahead with the tour as "boneheaded" following Coric's announcement of a positive test on Monday.

And, responding to a video showing Djokovic and others at the tournament partying shirtless together, Kyrgios directed further criticism at the 17-time grand slam champion.

He posted on Twitter: "Prayers up to all the players that have contracted Covid - 19. Don't @ me for anything I've done that has been 'irresponsible' or classified as 'stupidity' - this takes the cake."