Nick Kyrgios criticizes Australia's "really bad" treatment of Novak Djokovic

Fellow and former tennis players are weighing in after Novak Djokovic was denied a visa to play in the Australian Open. Among them was Australian tennis player Nick Kyrgios, who called his country's treatment of Djokovic "really bad."

"Look I definitely believe in taking action, I got vaccinated because of others and for my mums health, but how we are handling Novak's situation is bad, really bad," he tweeted Friday. "Like these memes, headlines, this is one of our great champions but at the end of the day, he is human. Do better."

Djokovic also received support from American tennis player John Isner, who said what he's going through is "not right."