Arsenal have been told Viktor Gyökeres will be their player once his asking price is met – with the Sporting Lisbon striker going on strike to force through his move to the Emirates Stadium.

Central to Gyökeres’s frustrations is a belief that he had an agreement with Sporting president Frederico Varandas to sell him for a certain fee, believed to be around €70 million (£60.4 million, $82 million). Varandas has publicly insisted Gyökeres will not be sold for such a price.