Arsenal looked to have won the race for Viktor Gyokeres after he snubbed Manchester United, but Sporting's demands have reportedly thrown a spanner in the works

But while Gyokeres is keen to push through a switch to the Emirates, the player’s agent, Hasan Cetinkaya, has become embroiled in a bitter feud with Sporting’s president, Frederico Varandas, over a proposed transfer fee for the Primeira Liga top scorer.