Marko Arnautovic seals West Ham move to surpass Andre Ayew as club's most expensive player

West Ham have signed Austria forward Marko Arnautovic from Premier League counterparts Stoke City for a club-record fee worth up to £25million.

The Potters revealed West Ham will pay an initial £20m, with an additional £5m depending on certain clauses being met.

"It feels special to me to be a West Ham player," Arnautovic, who has signed a five-year deal, told West Ham's official website.

"Everyone knows that West Ham is a big club, with big history and I'm happy to be a part of it now. I can't wait to get started.

"I played against West Ham at the old stadium - I didn't play last year at the new stadium because I was suspended - but I came to the game and I can only say it is a massive club with a lot of fans.

"They are crazy for football and this is what I like. The club is still growing, getting better and better and that's why I'm here."

The 28-year-old former Inter player joined Stoke from Werder Bremen in 2013 and scored 26 times across 145 appearances for Mark Hughes' men.

Arnautovic signed a four-year contract extension at Stoke 12 months ago, but will now join fellow new recruits Pablo Zabaleta, Joe Hart and Javier Hernandez at London Stadium.