Getting vaccinated has not been made mandatory by the ATP tour and it's widely believed it never will be in order to preserve the right to choose. Several players have spoken about the need to keep the choice open including Novak Djokovic and Stefanos Tsitsipas who both have refused the vaccine as of now.
Andy Murray was asked about the topic and he expressed his belief that unvaccinated players will face stricter rules than vaccinated ones:
“Over the next few months, things are going to probably end up changing quite a bit. I know the conversations with regards to the Australian Open and stuff are already happening. The players that have been vaccinated are going to be having very different conditions from players who are not vaccinated. I can see it’s going to become an issue over the coming months."
Andy Murray was right as the Australian Open already let players know that unvaccinated ones will undergo mandatory and strict quarantine as opposed to vaccinated ones. Murray believes there will be a lot of discontent on the tour:
“There’s going to have to be a lot of pretty long, hard conversations with the tour and all of the players involved to try and come to a solution. Even here in New York, you’ve got the situation with gyms and stuff, you need to be vaccinated. Eating in restaurants and things, obviously you have to be vaccinated."
Murray noted that for him currently, life on Tour is fairly normal compared to other players that are unvaccinated. Explaining that he said:
“I feel like I’m enjoying kind of a fairly normal life, whereas for the players that haven’t, it’s different. I’m sure they’ll be frustrated with that."
In the end Murray took a firm stance in favour of vaccinationg noting it's not only about the players but the general publci as well. He expressed satisfaction with being vaccinated as well as calling fellow tennis players to get vaccinated because it's their responsability:
"Ultimately I guess the reason why all of us are getting vaccinated is to look out for the wider public. We have a responsibility as players that are travelling across the world to look out for everyone else as well. I’m happy that I’m vaccinated. I’m hoping that more players choose to have it in the coming months.”