South Sydney captain Greg Inglis will reportedly miss the opening two rounds of the NRL season.
The 32-year-old has experienced discomfort with his 2017 knee reconstruction during recent training sessions.
New coach Wayne Bennett confirmed last week that Inglis "has just got some soreness there", but that it wasn't a major concern.
But he's also believed to be struggling with his conditioning and is currently 15kg overweight.
The Queensland star will also be unavailable for the Indigenous All Stars for their inaugural fixture against the Māori All Stars next month.
Inglis will miss the round-one game against the Sydney Roosters on March 15 and the following week's clash with St George Illawarra.
Earlier this month, the three-time Grand Final winner announced he would retire after the 2020 season, while also confirming 2019 would be his final in representative football.
He's on an 18-month good-behaviour bond, after pleading guilty to a drink-driving charge in November 2018.