Former world No. 25 Jeremy Chardy says he has a "series of problems" after taking the COVID-19 vaccine and his 2021 season is over. This summer, 34-year-old Chardy decided to get vaccinated and it didn't work out well for him. Chardy, now ranked at No. 73 in the world, claims he is unable to train and play. "Since I got my vaccine [between the Olympics and the US Open], I have a problem, I have a series of problems. As a result, I can't train, I can't play.[...] I prefer to take more time to heal myself and be sure...