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.
David Moyes has since bolstered his attacking ranks by landing Maxwel Cornet from Burnley, all but ending Vlasic's chances of earning a place in the first-team next term.
The 25-year-old- who can appear as a left winger, wing-back or full-back - has signed a five-year contract at the London Stadium, with a further one year option.
The Clarets - who were relegated from the Premier League last season - sold Cornet to the Hammers who met the £17.5m buy-out clause set out for the Ivory Coast international.
'It’s a new step for me to join this big Club and I’m really happy to be here, to be part of the project for the Club. I’m just excited to start,' Cornet told the club's website.
'Everyone knows the level here in the Premier League is very high and I want to play here for that, so I'm really happy to be here for the next stage in my career.
'It will be amazing to play in front of 62,500 fans at London Stadium. I played here for Burnley last season and I can’t wait to experience it as a West Ham player.'