West Ham will play hardball on a deal for Samir Nasri, demanding that the Frenchman gets into shape by losing 5kg, before they offer him a six-month contract.
Manuel Pellegrini is keen on a reunion with Nasri, who was part of the Manchester City squad that Pellegrini guided to the Premier League title in 2013/14.
West Ham are prepared to offer the former Arsenal midfielder an £80,000-a-week contract until the end of the season, but his condition has raised eyebrows upon his arrival in East London, where he underwent a medical.
The Mirror claims that Nasri must lose around 5kg by the turn of the year if he is to earn an offer from the Hammers.
West Ham are mindful of offering big wages to another player without ensuring that he will be able to play on a weekly basis.
Jack Wilshere, who is on similar wages to Carroll, has not played in West Ham's last nine league matches, although he could return against Newcastle on Saturday.
Nasri has been without a club since leaving Antalyaspor in January after breaching World Anti-Doping Agency (WADA) rules for receiving an intravenous drip of 500 millilitres of water containing nutrients. He will be free to play again from New Years Day.
The 31-year-old spent nine years in English football with Arsenal and Manchester City, and made 87 appearances during Pellegrini's three seasons in charge at the Etihad Stadium.