Samoa head coach Stephen Betham lamented his side's discipline as their Rugby World Cup hopes ended with a 26-5 defeat to Japan at Stadium MK.
The Islanders had three players yellow carded during Saturday's game and the Samoan boss admitted it hurt his outfit as Japan came out on top.
"Discipline cost us and we really couldn't get on the front foot because of that," said Betham as his charges came off second best in the game.
"We struggled in areas because we overexerted ourselves when you have to defend with thirteen men, but in saying that Japan played well, took their chances and I congratulate them on the win."
Betham added: "We set out with high hopes. We talked about discipline from the start of the campaign and unfortunately it let us down today."
Meanwhile, fly-half Tusi Pisi was equally disappointed with his side's effort as they were well beaten by an impressive Japan side on Saturday.
"I thought the referee was consistent," he said when asked whether he believed Craig Joubert made life tough for Samoa. "I think we let ourselves down with our discipline."
A dejected Pisi concluded by looking ahead to their pool finale next week: "We've got to park this result, take the learnings from this game and move on to Scotland."