Reigning Island Games champions Jersey will meet the competition's hosts, the Isle of Wight, in the semi-final of the men's football.
Jersey finished top of Group A, beating Greenland 2-1 on Tuesday night to make it three wins from three games.
Prolific striker Craig Leitch opened the scoring from the spot after nine minutes, with Craig Russell netting Jersey's second just before the hour.
Greenland grabbed a consolation in the last few minutes.
The Isle of Wight won all their group matches to book their place in the final four, while Guernsey will face Aland in the other semi-final after a penalty shoot out decider.
Aland and Saaremaa both finished with the same record in their group, but Aland won a special penalty shoot-out showdown 4-3 at Rookley FC to make it through.
Jersey's women are out of the tournament after a 2-2 draw against the Isle of Wight left them third in their group.