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West Ham have cmpleted the signing of Andriy Yarmolenko from German club Borussia Dortmund, the club have officially confirmed.

The Ukrainian has taken to social networking site Twitter to express his reaction after making the move. He wrote:

I’m ready for a new challenge great club, wonderful fans, best league. Together to the top . You are together with me pic.twitter.com/z7jpNMjr0P

— Andriy Yarmolenko (@Yarmolenko_9) July 11, 2018

The 28-year-old wide forward has signed a four-year contract with the Hammers. According to reports from Sky Sports, the Premier League club agreed a £17.5m deal with Dortmund earlier this week.

Yarmolenko then underwent a medical at West Ham’s training camp in Switzerland earlier this week before completing the move.

He becomes Manuel Pellegrini’s fifth signing since taking over as West Ham manager.

The club have recruited Jack Wilshere (free), Ryan Fredericks (free), Lukasz Fabianski (£7m, Swansea) and Issa Diop (£22m, Toulouse) already.

Yarmolenko is a versatile forward who is a proven goalscorer. He would add great quality and depth to the Hammers squad.

West Ham fans took to Twitter to respond to his message and they have given him a warm welcome.

Welcome to the academy! Good luck…and enjoy it! ⚒⚒⚒

— Eel weasles ⚒ (@SwealesLee) July 11, 2018

Can’t wait for you to get started! Welcome Andriy ⚒

— West Ham Yank (@TheWestHamYank) July 11, 2018

Better than salah

— Matt ⚒ (@MattLDN14) July 11, 2018

Beyond excited to have @Yarmolenko_9 on board at @WestHamUtd looking forward to this season!!!

— AppalachianHammer ⚒⚒⚒⚒ (@HammerThames) July 11, 2018

Welcome to West Ham Andriy if you give it your all us fans we love you. Best fans in England ⚒⚒

— Frank (@frankieleach91) July 11, 2018