The French hosted and won their first World Cup 20 years ago, beating Brazil 3-0 in the final in Paris.
Former France captain Platini was on the tournament's organising committee.
"When we organised the schedule, we did a little trickery," he told radio station France Bleu Sport.
"France-Brazil in the final, it was the dream of everyone.
"If we finished first in the group and Brazil finished first, we could not meet before the final."
