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Eriksen is currently recovering in hospital after he suffered a cardiac arrest in the stadium during Denmark's opening game to Finland in Copenhagen on Saturday.
Eriksen required 13 minutes of CPR and had to be resuscitated before being taken to hospital, where he remains in a stable condition.
The timing of the touching tribute has been chosen because Eriksen wears the number 10 shirt for the Danes.
"We'll put the ball into touch to applaud," said an emotional Lukaku.
"Several of our players have played with him, but tomorrow we'll be there to win the game, which promises to be difficult."
Lukaku, whocbagged a brilliant brace during Belgium's 3-0 win over Russia on Saturday, shouted a message of support down the camera during a celebration of one of his goals.
The Parken Stadium, the scene of Eriken's collapse, will play host to the game between the two teams.
"It will be very emotional to return," said Denmark boss Kasper Hjulmand.
"We expect to have incredible support from our fans and from the whole country.
"We have to be ready for that and use this energy in a positive way."
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