Upon his return to 'Los Blancos' from Lyon, Mariano was handed the significant number previously worn by Cristiano Ronaldo and Raul before him.
After scoring a spectacular goal in the Champions League against Roma, Mariano spoke to Real's official website:
"Wearing the number seven is an enormous responsibility because the players who have worn it in the past were and will continue to be legends. I intend to keep working hard.
"I'm very happy with the start, a win and a goal in my opening game.
"I felt the support and warmth from the crowd at the Bernabeu, both in the warm-up and when coming on, and I'm very grateful for how they've welcomed me.
"I couldn't wait. I try and work hard every day to repay the support the fans have shown me."