Republic of Ireland manager Martin O'Neill gestures on the touchline during the 0-0 World Cup play-off first leg against Denmark in Copehagen. Andrew Couldridge / Reuters
Republic of Ireland manager Martin O'Neill gestures on the touchline during the 0-0 World Cup play-off first leg against Denmark in Copehagen. Andrew Couldridge / Reuters

Martin O'Neill admits Republic of Ireland 'might have to score two' to overcome Denmark in Dublin