Arsenal will now have their scouts in attendance when Sporting CP host SL Benfica in the Lisbon derby this Thursday night to watch striker transfer target Viktor Gyokeres. The 25-year-old has enjoyed a sensational season since switching the English second-tier for Portugal’s top-flight last July. Gyokeres has flourished as a Sporting player and has taken Ruben Amorim’s side to second in the table behind their rivals, who sit just two points clear. But Gyokeres’ campaign has caught the attention of many top European clubs with a host of sides planning scouting trips. That is according to A Bola…