Martin O'Neill praised his Republic of Ireland players for keeping Denmark at bay in the first leg of their World Cup play-off - but acknowledged they will have to improve for the return fixture in Dublin.
Ireland avoided defeat for a sixth straight away game in their qualifying campaign as they fought out a lacklustre 0-0 draw in Copenhagen.
Visiting goalkeeper Darren Randolph was required to make a trio of first-half saves to move Ireland a step closer to a place in next year's tournament in Russia.
While delighted to keep a clean sheet on the road, O'Neill admitted Ireland will need to offer more of an attacking threat when they welcome the Danes to the Aviva Stadium on Tuesday.