Manchester United manager Jose Mourinho said it is “possible” that out-of-contract striker Zlatan Ibrahimovic could sign a new deal.
The former Sweden international, 35, was released in June after he not being offered a new contract.
He has been recovering from knee surgery at United’s training ground.
Mourinho said: “If the decision is to stay and wait until December – he can’t be back until them – why not wait? We are speaking and changing ideas.”
Ibrahimovic signed a one-year deal in July 2016, but an extension was not triggered after he suffered a season-ending knee ligament injury in April.
He scored 28 times in 46 games in all competitions for United.
Mourinho also said he wants to sign “one or two” more players this summer.
United have spent a combined £106m on Benfica defender Victor Lindhof and Everton striker Romelu Lukaku during the transfer window, and have been linked with three midfielders – Chelsea’s Nemanja Matic, Ivan Perisic from Inter Milan and Tottenham’s Eric Dier.
Mourinho said: “I can’t say any word about a Chelsea player.” However, he added that United “don’t have our door closed”.
“We need more,” he said. “We wanted four – 50% of the job is done. We need two more players, at least one. Everything is so difficult.”
Mourinho confirmed that United tried to sign 24-year-old Spain striker Alvaro Morata last month but could not agree a fee with Real Madrid.