Kurtley Beale underwent successful knee surgery on Monday, Waratahs have announced.
The 60-cap Wallabies back tore the patella tendon from his patella bone when landing after contesting a high ball in the Super Rugby victory over Bulls on Saturday.
It was initially feared the 27-year-old - whose impending move to Premiership club Wasps was confirmed a day before the injury - could be facing up to a year on the sidelines.
However, a positive initial prognosis determined the patella tendon, while torn from the patella bone, had remained intact, with no other damage to the knee.
An expected recovery time of four to six months was predicted prior to what proved to be a successful operation, meaning Beale could return to action for Wasps early in the 2016-17 Premiership season.
"The procedure went well with a good fixation of the patella tendon back onto the patella bone," Waratahs said in a statement.
"Beale will remain sidelined for four to six months and will spend the next six weeks in a range of motion braces."