Valencia, 25, scored all three of Ecuador's goals in the 2014 World Cup, attracting attention from throughout Europe as a result.
But it is West Ham who have won the race for his signature, with the Hammers announcing the signing on Thursday morning ahead of their pre-season tour of New Zealand.
"West Ham United are delighted to announce that exciting Ecuador international forward Enner Valencia will become the Club's fifth summer signing, subject to a successful work permit hearing," a statement on their official website read.
"Valencia, who impressed hugely in scoring three goals for his country at the FIFA World Cup finals in Brazil, will join West Ham on a five-year contract for an undisclosed fee."
Source : PA
Source: PA