Novak Djokovic's father Srdjan said on Friday he would not attend his son's Australian Open semi-final and would instead "watch from home".
Novak Djokovic's parents, wife and children watched him win a record-breaking 23rd Grand Slam title at the Philippe Chatrier court on Sunday.
Djokovic, who is seeking to win a record 21st Grand Slam title at the tournament this month, said in a legal challenge on Saturday that he had been given the medical exemption because he had contracted COVID-19 last month.
Novak Djokovic has so far declined to disclose whether he is vaccinated and his father told Serbia's TV Prva that governing body Tennis Australia's stance on players being vaccinated was tantamount to "blackmail".
Djokovic's father blamed the cancellation of the tour on Dimitrov. There is nothing to suggest that Dimitrov spread the virus to others.
Novak Djokovic is still uncertain whether he will take part in the 2022 Australian Open but will soon make a decision, the World No 1 said after Serbia's 2-1 defeat by Croatia in the Davis Cup semi-finals on Friday.
Novak Djokovic advanced to a record-extending 10th Australian Open final with an emphatic win over American Tommy Paul.
Novak Djokovic said his ailing father's struggle with serious illness had inspired him to beat Roger Federer in a thrilling climax to the ATP World Tour Finals on Monday.
Serbia's tennis federation (TSS) deserved no credit for the national team's maiden Davis Cup win and needed 'a thorough reconstruction', Srdjan Djokovic, father of world number three Novak Djokovic, said.