Valerie Adams is set to undergo the knife, after dramatically pulling out of the Continental Cup in Morocco with a shoulder injury.
The New Zealand shot put star had an injection to get through the competition for team Asia-Pacific.
However, Adams withdrew after the warm-up as the injection appeared to hit a nerve, which affected her grip.
Adams - the two-time defending Olympic champion - has won the past 56 events she has competed in.
The 26-year-old's manager Nick Cowan said Adams will return home to NZ, and continue her rehabilitation.
''She has managed her season this year with injuries very well and it was unfortunate today she couldn't complete her season as she planned,'' Cowan said.
''The focus now is for her to get home and work with her medical team on the long term strategies and solutions to get back to 100 per cent fitness and form.''
Cowan confirmed surgery was the likely way of getting Adams fit, with the Olympic Games in Rio de Janeiro on the radar in less than two years' time.
"That [surgery] is the likely path that we'll go down and then I think it's a matter of assessing how she goes forward to make sure we're on top of these niggles all the time," he added.