Players are prohibited from playing in or attending any tennis event sanctioned by any international tennis governing body or national association.
The 26-year-old finished 2021 at a career-high ranking.
The Greek plans to have a big season in 2022.
US Open champion, who was scheduled to face Belinda Bencic, is in quarrantine.
Former world No. 1 Manolo Santana, a Spanish tennis legend, has passed away.
Naomi Osaka makes her long-awaited return a week before the Australian Open at the WTA 250 event.
The Scot will move forward with a new coach in 2022.
