Arsenal are said to be hugely impressed with Swedish striker Viktor Gyokeres.
The Sporting CP center forward, who previously played in England with Coventry City, is a hot commodity this summer.
Per Jornal De Noticias, Arsenal are one of the teams that will be vying for his signature.
The Gunners are eager to sign a top class forward who can more reliably deliver goals for the team.
Both Gabriel Jesus and Eddie Nketiah have failed manager Mikel Arteta in that respect.
The Express adds that Arsenal have scouts at almost all recent Sporting games.