"It was important for us to start with a win as the first game is always complicated," Ronaldo said. "We had some good and bad moments in the game and have to improve."
Real Madrid's newcomers weren't signed to sit on the bench, so all six were in Manuel Pellegrini's starting lineup -- Cristiano Ronaldo, Kaka, Karim Benzema, Xabi Alonso, Alvaro Arbeola and Raul Albiol.
In addition, two other starters -- Ezequiel Garay and Esteban Granero -- were playing their first games for Real since returning to the club.
Besides Diarra and Raul, the only other holdover from last season in the Real starting lineup was goalie Iker Casillas.
"There's a lot of room for improvement," said Xabi Alonso. "We need to gel. As soon as possible."