Monaco cling on with 10 men to avoid French Cup shock
Elsewhere, goalkeeper Kjetil Haug stopped two spot kicks as Toulouse eliminated Angers in a shoot-out after the clash of Ligue 1 clubs ended 1-1.
In Orleans, Monaco, deprived of 10 key players, looked anxious and struggled to impose themselves.
Orleans squandered a couple of chances before Folarin Balogun converted one of Monaco's rare opportunities after 27 minutes.
After Monaco's Stanis Idumbo picked up a second yellow card in the 44th minute, the visitors sat back.
They survived several scares before 19-year-old George Ilenikhena...