Gravesen fully focused on Luxembourg
Luxembourg are currently at the foot of Group 2 - without a win in the competition so far, but the Everton ace is adamant that the Danes will not make the same mistakes they made against Bosnia-Herzegovina, when they were beaten 2-0.
He told Danish newspaper Ekstra Bladet: "If you can't take a match versus Luxembourg seriously, you don't belong in the squad and if someone runs out of steam during the match they should be substituted.
"We messed up against Bosnia, four days after we had beaten Romania 5-2 in Bucharest, but this time we shall get full points out of the European Championship qualifiers versus Norway and Luxembourg."
The Danes are top of Group 2, level on ten points with Norway, and Gravesen hopes that results go Denmark's way in the latest round of qualifying matches.
He added: "I hope that Romania will beat Norway in Oslo tonight (Wednesday), because then we will be lined up for a real final match between us and Romania for the first place and direct qualification to the European Championships in Portugal."