Australian Thanasi Kokkinakis said he has undergone surgery in a bid to resolve a lingering pectoral injury.

Thanasi Kokkinakis has undergone surgery to try to correct the "mental and physical torture" he was suffering through a long-standing pectoral injury.

The tennis star was hampered by the issue during this year's Australian Open, where he bowed out of the men's singles draw in the second round. Kokkinakis still travelled to Stockholm in early February for Australia's Davis Cup tie with Sweden but did not play a match.

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.