Portugal are gearing up for the U18 European Championship Division B tournament and lost twice in friendly games to Bulgaria.
Taking on opposition that will compete in the Division A event, the Portuguese fell 62-48 in the first contest.
In the second game, Portugal only trailed 26-21 at half-time but ended up falling 63-48.
Rafael Wildner and Daniel Coelho each scored 12 points and Eduardo Guimarães contributed 11 for the Portuguese.
The U18 European Championship Division B will be staged in Tel Aviv, Israel, from July 22 to August 1.
Portugal are in Group B with Scotland, Belgium, Hungary and Bosnia and Herzegovina.