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.

Mikel Arteta has made Viktor Gyokeres his top transfer target this summer and may be close to getting his man At Arsenal after a report claimed a conclusion to lengthy talks was "imminent"