Despite agreeing the basic framework of a move for Gyökeres weeks ago, Arsenal and Sporting found themselves butting heads over the nature of the add-ons proposed by the Gunners, which invited pressure of a potential hijack from long-term admirers Manchester United.

Gyokeres was focused only on joining Arsenal and, despite late interest from elsewhere, he did not consider any other team.

Arsenal are putting the finishing touches on a deal to sign Viktor Gyokeres after a key breakthrough in negotiations with Sporting. The Gunners have struck a deal worth £54.8million plus £8.6m in potential add-ons but the deal was being held up due to issues over the nature of the add-ons.