Lleyton Hewitt's retirement could end as early as tomorrow.
Australia's new Davis Cup captain officially added his name to the team to take on the USA in Melbourne, starting today, after young gun Nick Kyrgios was ruled out on medical advice.
What role if any Hewitt will play wasn't clear, but Sam Groth will now lead the Aussie team in today's opening singles against John Isner, with Bernard Tomic to take on Jack Sock.
Groth had been scheduled to play doubles tomorrow with Davis Cup debutant John Peers, with his spot potentially taken by Hewitt, who has been the hardest worker on the practice courts in recent days.
With former world No.1 combination Bob and Mike Bryan to represent the Americans in the tie, the doubles could prove crucial.
Bob Bryan said his team hadn't been surprised by Hewitt's late inclusion.
"Lleyton's put in a lot of work this week," the 37-year-old said.
"Our practice courts are right next to theirs and he's been playing a lot of singles ... been playing doubles, so we're gonna be ready for anything."
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