Kountouris revealed that Clarke suffered a severe injury just two weeks before the start of the Sri Lankan tour.
The Australian all-rounder pulled up mid-way through his spell during the tri-series final.
Clarke will bat in a local game this weekend, embarking on a gradual return to competitive cricket.
Kountouris said that the surgery was successful and the 33 year old Australian captain is expected to recover completely.
This is the third hamstring setback for Clarke since August 2014.
Clarke is adamant he will not play unless 100 per cent fit.
Team physio Alex Kountouris says operation on Marsh's elbow was successful.
Marsh should be back for the opening match of the Test Series against India.
Michael Clarke has been ruled out of the Sheffield Shield final with a fractured shoulder.
Australia’s George Bailey allows viewers a sneak-peek into the Australian dressing room ahead of the third T20I against South Africa at Durban. Bailey shows around the different kits of teammates and also reveals what mystery lies inside the bags. One particular bag has a box full of Gatorade with Bailey elaborating as...