Arsenal and Manchester United target Viktor Gyokeres, 27, has refused to have clear-the-air talks with Sporting and threatened to go on strike as he tries to force through a move from the Portuguese club.

Sesko to Arsenal is one of the biggest and longest-running transfer sagas of the summer so far with the window now back open for business, having been linked with a high-profile switch to north London for more than a year.

Viktor Gyokeres has been left furious with Sporting Lisbon for not allowing him to leave the club, as his transfer saga with Arsenal and Manchester United rumbles on