West Ham winger Nikola Vlasic arrived in Turin on Tuesday night ahead of joining Torino on a season-long loan.
The attacking midfielder has struggled to settle since joining from CSKA Moscow for £25.7m last summer.
The loan can be made permanent for £12.9m.
Vlasic's exit comes having struggled for game time since arriving at the London Stadium despite making a total of 31 appearances last season.
However, he only started six Premier League games last term, netting his only goal in the top flight during a five minute cameo against Watford back in December.