ISTANBUL   Brazilian midfielder Oscar returned to Sao Paulo on Tuesday on a three-year deal, after 14 years. "I'm happy to be back in Brazil and to play for São Paulo, which is the club where I started, got my foundation, and became prominent. I'm happy about this opportunity to return, and so is my family," Oscar said in a statement. "I'm grateful for the affection I've received on social media in the last few days, and I'll do my best to achieve great things together," he said. Oscar, 33,