"I accepted (Schalke's offer) because I wanted to play in a very competitive championship," he told Peru.com. "I received offers from other clubs.
"There was one from Tottenham in England, another one from the Italian Fiorentina, and one more from a Russian team.
"I want to start a new stage in my life.
"I won four league titles with PSV, was their top goalscorer, I was always backed by my team-mates and by the fans.
"I must say my time in The Netherlands was great and I believe it is the moment to emigrate, to look for new aims."