The 29-year-old’s Australian Open return was short-lived — and he warned it could be his last singles match in his homeland.

Nick Kyrgios and Thanasi Kokkinakis, dubbed the Special Ks, have pulled the pin on their doubles campaign and walked off the court.

Nick Kyrgios has fuelled further discussion about the future of his tennis career as he said that he was "weighing up his options".

Kokkinakis has been struggling with a pectoral injury for some time, and was forced to withdraw from the Adelaide International last week. He managed to win his first-round singles match at the Australian Open, before suffering a heartbreaking five-set loss in the second round.

The apologetic Aussie was plainly ‘shattered’ to tell his great mate Nick Kyrgios it was all over. Thanasi Kokkinakis’ dream of repeating his stunning Australian Open doubles success with Nick Kyrgios has been dashed by his debilitating pectoral muscle injury.

Thanasi Kokkinakis says a doctor advised him not to play before he and Nick Kyrgios retired injured in the men doubles first round at the Australian Open.

Kokkinakis was hampered by a long-standing pectoral injury as he went down 7-6 (7-3) 3-6 6-3 5-7 3-6 to Jack Draper in a four-hour-and-35-minute heartbreaker. Speaking after the match, Kokkinakis said he wouldn't even be able to lift his right arm to serve on Thursday night.

Both Kyrgios (strained abdominal muscle) and Kokkinakis (right shoulder trouble) came into the match dealing with physical issues.

Nick Kyrgios' Australian Open farewell could be at risk after his doubles partner, Thanasi Kokkinakis, raised concerns about his fitness to compete in their opening match in Melbourne.

Nick Kyrgios and Thanasi Kokkinakis are back in the Australian Open men's doubles draw for the first time since winning the title in

It was a miracle that they were even out there, but in the end a win was too much to ask of Thanasi Kokkinakis and Nick Kyrgios, who were unable to overcome their Aus Open injury issues. The first miracle came when Nick Kyrgios and Thanasi Kokkinakis produced Lazarus-like recoveries from their respective death beds to appear at John Cain Arena for their opening round doubles match.