The Manchester United attacker rued his nation's lack of cutting edge and again cited the 4-0 defeat to Germany as crucial in their tournament exit
Portugal attacker Nani feels his side could easily have beaten Ghana by a bigger margin than 2-1 in Thursday's World Cup encounter.
Paulo Bento's men needed a big win over the African side in order to keep their chances of qualifying for the round of 16 alive, while they also needed Germany to beat USA in the other game in Group G.
Germany kept their side of the bargain by winning 1-0, but Portugal failed to defeat Ghana by a margin big enough to leapfrog Jurgen Klinsmann's men in the table on goal difference.
"We knew that it would be hard to qualify for the next round. We needed five goals and that proved to be too much," Nani told Goal.
"We got a lot of chances to score, but we got only two goals in the end. We have to accept that we're out and move on.
"I think we deserved to progress, but those four goals we conceded against Germany cost us. We were determined to turn things around against Ghana, but it was not enough."
The attacker also briefly discussed the future of head coach Paulo Bento and stressed that the 45-year-old will not leave his job.
"The coach has said that he will not leave. He will not resign. He has done a good job picking the squad for the World Cup. Now we must get back on track."