Kyrgios has been vocal in his criticism of some other players during the pandemic, waging a social media battle with top names who played at Novak Djokovic's ill-fated Adria Tour exhibition.
Earlier, World No. 1 women's tennis player Ashleigh Barty also pulled out of this year's US Open due to concerns over the COVID-19 pandemic.
Djokovic's father, Srdjan, trained his guns at Dimitrov and claimed that he participated in the tournament while he was 'sick'.
Kyrgios has endured a rocky relationship with Djokovic, once describing the Serb's post-match 'cup of love' celebrations as "cringeworthy".
Kyrgios gave AUD 200 (USD125) for every ace he hit across his home tennis summer, which ran until the end of the Australian Open.
A euphoric Nick Kyrgios lifted Alex de Minaur over his shoulder and carried him off the court.
The 6-4, 6-2 victory over the American gave a fourth title for the enigmatic 22-year-old Australian, and the first since 2016.
Kyrgios, dubbed a 'human headline' by Australian media, is coming off his best year yet when he won three titles.
The tennis authorities yesterday hit Nick Kyrgios with another batch of penalties for his lack of effort in Shanghai last week.