The winger is preparing for his third loan spell in the Championship after struggling to make an impact at Sunderland.
The Swiss international signed on loan for Nottingham Forest this week.
Bournemouth sold the winger to Newcastle United earlier this summer.
Newcastle United lost 1-0 to Fulham at Craven Cottage.
The Frenchman is set to join the Hammers this weekend.
The 24-year-old has left the Scottish Premiership side for Rotherham United.
Newcastle United were beaten by Fulham in their Championship opener on Friday.
Don Goodman doesn't think Leeds will be challenging the top eight this season.
The Gunners have been in impressive form in pre-season so far.
Many are hoping to see Rangers challenge Celtic for the title next season.
West Ham United played host to Everton at the weekend.
Signed on loan, was Mo Barrow a terrible signing by Leeds United or purely a desperate one?
Garth Crooks praises Arsenal's Gabriel Paulista.
Aston Villa ran out as 1-0 winners over Birmingham City yesterday.
Manchester United striker has been linked with a return to Everton.
Nice midfielder Jean Michael Seri would cost a huge fee if Everton and Southampton want to bring him to England this summer.
Celtic have been linked with a loan move for another Manchester City prospect.
Palace chairman praises Liverpool supporters.
Leeds sold Lewis Cook to Bournemouth last summer.
Ibrox side Glasgow Rangers were beaten 2-0 by their rivals Celtic at Hampden Park yesterday.