Thanasi Kokkinakis has undergone surgery for an injury that hampered his Australian Open campaign this year.
The 28-year-old battled a pectoral issue and failed to go deep in the singles draw, while also retiring hurt alongside partner Nick Kyrgios in doubles.
After undergoing rehab for the lingering issue, Kokkinakis has since opted to go under the knife and now looks set to spend a lengthy stint on the sidelines.
Thanasi Kokkinakis receives medical treatment during the Australian Open. Â Getty
"Been struggling for a little while with this," he said via Instagram.
"Probably my toughest challenge to date. I've been trying to find the answers to an ongoing pec injury that I haven't been able to fix.
"Let's see how this goes. Thank you for all your ongoing support."
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Kokkinakis copped some criticism at his home grand slam after opting to play in big-money challenger competition prior to arriving at Melbourne Park.
He made it through the first round of the slam, before losing in five sets to British star Jack Draper in a gruelling clash.
The one-time Australian Open doubles champion has a career-high singles ranking of No.65 and is yet to reach the quarter-finals of a major.