Andrea Petkovic is forced to withdraw from the Australian Open after injuring her knee at the Hopman Cup.

“It is a rupture of the medial meniscus,” the former Top 10-player told reporters. “If they have to trim it then I will only be out for a month. If they have to sew it up again, it will take two to three months. Nonetheless, I am quite relieved it is not my ACL, I feared the worst. I hope I will be fine after a month.”