Rafa Nadal called on Monday Novak Djokovic’s COVID-19 vaccine exemption controversy in Australia “a circus” and joked that he would prefer that the world number one tennis player didn’t play at the upcoming Australian Open. Djokovic was released from Australian immigration detention on Monday after winning a court challenge to remain in the country to pursue his bid for a record 21st Grand Slam title at the Australian Open. “Whether or not I agree with Djokovic on some things, justice has spoken and has said that he has the right to participate in the Australian Open and I think it is the fairest decision to do so, if it has been resolved that way. I wish him the best of luck,” Nadal told Spanish radio Onda Cero. Djokovic, 34, was granted a medical exemption from vaccination requirements to play in the Australian Open, but was denied entry into Australia and …