For the past two decades there have been 3 clear challengers to Novak Djokovic's dominance over the tennis world. Roger Federer, Rafael Nadal and Andy Murray. However, a new challenger has approached which looms more powerful and dangerous than any previous opponent: vaccinations. The vaccination took the victory at the recent Australian Open, but Match 2 will take place shortly at the French Open and Wimbledon. Who will come out on top?