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.

Viktor Gyokeres has yet to report for pre-season training at Sporting, with sources confirming to Sporting News that the striker is holding off on returning to the club's Cristiano Ronaldo Academy amid ongoing interest from Arsenal.

Arsenal have endured 'intense' negotiations with Sporting Lisbon over a deal for Viktor Gyokeres but the Gunners are now close to giving up on a deal for the striker and looking elsewhere