The Brazil fullback signed for the Gunners yesterday.
He admits the problems besetting Turkish football and Fener swayed his decision: "It would be wrong to say otherwise. Although I was happy there, I had to make this decision for the sake of my career.
"Fenerbahce are not in a good situation. This transfer is in line with the best interests of the club."
Andre Santos added: "I have said I will leave the door open. I love this club and the Turkish people. Why couldn't I come back?"