The Korea native said she felt good today and has been working on her driver recently .
Choi , who won the Marathon Classic presented by Owens Corning & O-I in 2015 , is looking for her second victory on Tour .
The Korea native said Choi felt good today and has been working on Choi 's driver recently .
Choi , who won the Marathon Classic presented by Owens Corning & O-I in 2015 , is looking for her second victory on Tour .