The in-form striker was one of the stars of the group stage in Brazil, but his three goals in three games were not enough to get the South Americans into the last 16.
Currently plying his trade in Mexico, Valencia looks set for a big move to Europe with attention having been on him before the competition due to his 18-goal haul last term.
After being wowed by his displays in recent weeks, Sam Allardyce is ready to join the battle as he plots to bring a more attractive playing style to Upton Park.
Valencia’s value is unclear, but Pachuca are likely to have inflated his price thanks to proceedings at the World Cup.
Newcastle have also been linked with the 25-year-old as they plot their own moves to solve a major striking crisis at St James’ Park, while Everton have also been aligned with the player following Romelu Lukaku’s return to Chelsea.