The attacker has started the 2018/19 season in good form by scoring the winning goal against Rayo Vallecano on Saturday evening.
"I've seen the love that the fans at the Estadio Wanda Metropolitano have towards their No.7," he explained in a post-match interview.
"The last match here wasn't the best reaction and I understand why, but now only the present matters.
"I'm very happy to be here, I'm going to give everything for this club and my teammates.
"They did everything to make me stay and feel happy."