(AAP Image/Stefan Postles)
Cameron Munster says Billy Slater's retirement announcement shocked Melbourne, who were hoping the club great would play another NRL season.
The five-eighth says the Storm have even more motivation to win back-to-back NRL titles as they look to send Slater out a winner.
Munster says he's not sure if the loss of Slater means he will return to his favoured fullback role.
© AAP 2018