Karim Benzema's first half strike handed Real Madrid a 1-0 win over Carlo Ancelotti's former side Paris Saint-Germain.
Real gained the early ascendency, with Cristiano Ronaldo looking dangerous down the left flank, although PSG should have taken the lead through Ezequiel Lavezzi.
Benzema made the most of his first real chance on goal in the 23rd minute, latching onto a Mesut Ozil cross and burying his shot past PSG goalkeeper Salvatore Sirigu with what proved to be the decisive goal.
Right-back Daniel Carvajal contained Zlatan Ibrahimovic for much of the match, although the Swede worked his way through on goal, only for his efforts to be saved by a resilient Diego Lopez.
Ronaldo was a clear standout in the second half, with four shots on goal that were all turned away by Sirigu.
Meanwhile, Gerardo Martino made a successful start to his Barcelona career as the Spanish champions eased to a 7-0 win over Valerenga.
The Catalan giants raced out to a 3-0 lead inside the opening 15 minutes, with goals to Alexis Sanchez, Cristian Tello and Lionel Messi, before Jonathan Dos Santos gave Barca a 4-0 advantage at the break.
Jean-Marie Dongou then took his chance to impress Martino with a second-half brace that added to Valerenga's woes. Joan Angel Roman completed the rout with a late goal.