Thiago Silva has not recovered enough from a left thigh problem he picked up during a Ligue 1 match against Ajaccio last month and is expected to be fit for the return leg at Parc des Princes in three weeks.
Motta, who has also had a thigh injury, returned to full training on Saturday but coach Carlo Ancelotti did not name the Brazilian-born player in the squad.
Former England captain David Beckham will travel to Spain but has not made the squad as he has yet to train with the Ligue 1 leaders since joining them on a five-month deal on January 31.
