Arsenal are in talks to sign Sporting's prolific Sweden striker Viktor Gyokeres.
As first revealed by BBC Sport on Thursday, Arsenal have had a clear focus on completing a deal for the 27-year-old in recent days and the club is now advancing in their pursuit of the forward.
Discussions over personal terms for Gyokeres and with the Lisbon club over a transfer fee are accelerating, with Arsenal's sporting director Andrea Berta leading negotiations.
A deal has not been finalised though, and there remains a degree of caution at Arsenal until agreements are reached.