Juventus striker Nicolas Anelka is capable of playing at a 'high level' for another three or four years, according to his agent.
The 34-year-old joined Juve in January on an initial short-term contract until the end of the season with the option for a further year.
The former Chelsea man has made just two substitute appearances so far, in Serie A and the UEFA Champions League.
Anelka's departure from Chinese side Shanghai Shenhua ahead of his Juve move had prompted speculation he could be set to retire.
But his agent, Doug Pingisi, says the Frenchman is capable of playing on for at least three more years and is not ready to hang up his boots.
However, Pingisi says an unnamed non-football related project that Anelka has lined up is the only thing that could prematurely end his playing days.
He told France Football: "He is at Juve so far. Then, we will see.
"Nico is not ready to hang up his boots. He is still capable of playing at a high level for very good clubs.
"For me, he still has three or four good years ahead of him."
Pingisi added: "The only thing that could make him stop is his second activity that could become his main one.
"He has prepared for his life after his football career for a while. I cannot tell you more. I'll let him tell you about at the right moment."
With his side just two points clear of the relegation zone ahead of the Devon derby with rivals Exeter on Saturday, Sheridan wants his side to be focusing on the fight for survival.
Sheridan signed a deal until the end of the season when he was appointed and several first-team regulars will also be out of the contract at the end of the campaign.
"I don't know what my circumstances are going to be," he told the Plymouth Herald. "Obviously, players would like to know what's happening with them, or what my thoughts are of contracts.
"That's only right. They have got families and they have got to live. But I have spoken to the chairman and the people involved and I think its right we deal with it once we know where the club lies."
Argyle have picked up 11 points from their last six games but they still have to face four of the division's top seven - starting with Paul Tisdale's Grecians this weekend.
