World champion Novak Djokovic has been expelled from Australia for not being vaccinated against COVID-19, missing out on his 10th Australian Open title and an unprecedented 21st Grand Slam. Not only did the image suffer, the outside world also speculated why he was so determined not to get vaccinated. Djokovic was expelled from Australia on the eve of the Australian Open (16th) and will not be allowed to enter Australia for three years. Australian Immigration Minister Alex Hawke (Alex Hawke), who cancelled his visa, said that Djokovic's anti-vaccine idea has no effect. Threats to public order, keeping him in Australia could lead to "civil unrest", and his presence will fuel anti-vaccine sentiment at a time when the country's outbreak is severe. In addition, the French government passed a new vaccine bill earlier, requiring people to hold a vaccine pass before they can enter and leave public places. The French Ministry of Sports pointed out that this law applies to all athletes and spectators. Another source pointed out that the US Open has also followed the policies of Australia and France, and athletes who have not been vaccinated are not allowed to participate, so Djokovic may not be able to participate in the French Open and the US Open. Adverse vaccine reactions have been reported for any brand of Covid vaccine. For athletes, the body is their most important asset. At this time, it is really difficult to choose whether to vaccinate or not to vaccinate.