PARIS — Only two months after picking up her racket for the first time following a knife attack at her home, Petra Kvitova will be playing at the French Open. Kvitova has missed all season while recovering from surgery on her racket-holding left hand. Doctors initially thought she would need more time before returning to tennis. “It wasn’t easy, but I’m happy that I work through this and I can play tennis and I can be in the draw,” she said. Kvitova, who won the Wimbledon title in 2011 and 2014 and climbed as high as No.