Soccer-West Ham sign midfielder Fernandes from Sion

LONDON, Aug 25 (Reuters) - Swiss midfielder Edimilson Fernandes has joined West Ham United from Sion, the London club said on their Twitter account on Thursday. No fee was disclosed but media reports put it at five million pounds ($6.59 million). A Swiss Under-21 international, Fernandes is a product of Sion's youth academy. He made 26 top-flight starts for the club last season. ($1 = 0.7586 pounds) (Writing by Mark Greaves; Editing by Tony Jimenez)