The match in Prague will determine if Denmark clinch a third consecutive World Cup appearance. The Danes enter the final in high spirits after a 4-0 victory over North Macedonia in Thursday's playoff semi-final.
"Reaching a World Cup finals is something special and unique. It is an extraordinary experience that a manager might only encounter once in their career," Riemer told reporters on Monday.
However, Riemer was wary of the Czech threat from set-pieces with their attack led by striker Patrik Schick.
"We have prepared for it and analysed them. We have great faith in our players, and set-pieces are also part of their daily routine at their clubs. However, we are aware that set-pieces are a major strength for the Czech Republic," he said.
Striker Rasmus Hojlund was confident of his teammates rising to the occasion.
"It is probably one of the biggest games I have played in my career so far," he told reporters.
"I am not exactly ancient yet, but I have still played a fair number of matches at a high level. There have been nerves, but it is about turning that into something positive."