Petra Kvitova described being able to move the fingers on her left hand again as "the greatest Christmas present I could have wished for".
The Czech, 26, was stabbed at her home by an intruder on Tuesday and needed four hours of surgery on her hand.
"While what happened to me was very scary, I do not see myself as a victim, I do not feel sorry for myself and I will not look backwards," said Kvitova.
"I will do everything to return to the sport I love as soon as possible."
Kvitova, who won the Wimbledon singles title in 2011 and 2014, is expected to be unable to compete for at least six months.