The experienced France forward underwent a medical with the club on Monday, but they are anxious about how long it will take him to reach the required fitness levels to play in the Premier League after 18 months out. It is understood, should he pass the medical, that he will join on a six-month deal with an option to extend his stay.
Nasri was a regular at Manchester City under the Hammers manager in their title-winning campaign in 2014.
HBO Announces Return Date for 'Game of Thrones'
The network confirmed that the final season will start in April with the words at the end: "The Final Season April 2019 ". Game of Thrones director David Nutter let slip an interesting factoid while doing a Reddit AMA on Tuesday.
I'm a Celebrity: Harry Redknapp, Sair Khan and Nick Knowles in line-up
Southampton Football Club have poked fun at former manager Harry Redknapp for his upcoming appearance on I'm A Celebrity ... Barrowman - best known for playing Captain Jack in Doctor Who and Torchwood said: "My fans will freak out".
Melania Trump Calls For Deputy National Security Adviser's Firing
The statement follows a Wall Street Journal report that President Trump made a decision to remove Ricardel "at the urging of Mrs. It's not clear who would succeed her, or whether the White House has potential replacements lined up.
The 31-year-old was originally handed a six-month ban for the offence in February but it was later extended to 18-months following an appeal, although it was backdated until July 1, 2017.
It was alleged Nasri received 500 millilitres of hydration in the form of sterile water containing micronutrients while on holiday in the U.S. during a time when he was playing for Sevilla, on load from Manchester City.
But the former France global has encountered a troubled career since, having been banned for 18 months by UEFA for doping.
Meanwhile, West Ham have reinstated their academy coach Mark Phillips after investigating his involvement in a march organised by the Democratic Football Lads Alliance (DFLA).