Ricardo Quaresma, Raphael Guerreiro and Eder found the net as Portugal secured a convincing victory ahead of their trip to Wembley to face England on Thursday
Portugal coach Fernando Santos is hoping to see some improvement from his side ahead of Euro 2016 despite their 3-0 friendly win over Norway on Sunday.
Raphael Guerreiro and Eder added to Ricardo Quaresma's first-half goal as Portugal began preparations for next month's European Championship in France.
While Santos believes the result at the Estadio do Dragao was a positive one, there are still a number of things to work on before the tournament gets underway on June 10.