The 17-year-old has supposedly attracted the interest of the Gunners and Bayern Munich following his displays at youth level for Hammarby, and Roback made his debut for the senior side in their Svenska Cupen quarter-final defeat to IFK Goteborg.
"There is a strong interest ...he has also been to Arsenal," Jansson told Swedish outlet Fotboll Direkt.
"I understand the interest. He is a forward with a great physique and speed and already a skilled scorer."
With Arteta set to be working with limited funds during the summer transfer window amid the coronavirus pandemic, Roback would represent an ideal signing for the Spaniard in this period of financial uncertainty.