The 17-year-old is one of Portugal’s most exciting talents and has a release clause of €45m.
It’s reported that Arsenal have shown a willingness to pay the clause to avoid another ‘Ronaldo mistake‘.
Kia Joorabchian, Joelson’s agent, will accompany an Arsenal delegation to Lisbon with the aim of closing a deal.
Joorabchian has close relations with the English side, which will help faciliate Joelson’s move to Arsenal.
Joelson spent much of the season in Sporting’s under-23 side, but made four first team appearances after the Portuguese restart.