On 7 February 1989, Blanc made his debut for the senior national team against the Republic of Ireland. France, then in reconstruction after the retirement of numerous key players, did not manage to qualify for the 1990 FIFA World Cup. Shortly after that, they started an impressive 19-game unbeaten streak, including eight wins out of eight in Euro 1992 qualifying, making them one of the favorites to win the competition. They would, however, get knocked out in the group stage by eventual winners Denmark.