"I cannot accept we have nothing left to play for," said the Liverpool goalkeeper.
"It is an honour to represent your country. We want to finish first in the group and we want to please our fans.
"As a player, Healy is in really good form and you have to respect that.
"He has to be rated among the top strikers I have faced, given his record.
"But it is not just about one man. The whole team have had a good campaign and could still qualify.
"We have to make sure we take care of their strengths because they are a side in form at the moment."
