West Ham boss Manuel Pellegrini is hopeful that attacking midfielder Samir Nasri will make a positive impact for the Hammers in the second half of the season.
The 31-year-old France international has been training with the Premier League club for some time in a bid to earn a contract, having been forced to take time away from the game due to off-field issues.
And his efforts have paid off, with Pellegrini happy to work with Nasri again, having previously been in charge of the player at Manchester City.
The Chilean told his club's official website: "He is a player I obviously know well from our time together at Manchester City.
"He has been working very hard here in recent weeks to build up his fitness and condition after a long period without playing and he is now very determined to return to his best.
"Samir will give us another dimension in our attacking play. He already has very good experience of the Premier League and we hope that he will have a positive impact on the team between now and the end of the season."
Nasri started his career with Marseille, before enjoying spells with Arsenal and the Citizens, while he has also featured for Sevilla and Antalyspor.
He has won 41 caps for his country, while in his time in Manchester he helped City to two Premier League titles and a League Cup success.
West Ham can be backed at 4/6 to finish in the top half of the Premier League table this season and are 40/1 to claim a top-six finish.
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