The Brazil star said: "You have to improve every day if you want to win the title.
"We need to keep working hard and keep our feet on the floor. It was just one more game and three points.
"It was a difficult game against a strong team. Both teams created a lot of opportunities.
"Manchester City have scored many goals in their last few games but we stopped them and it was good for us.
"When you play against a strong team like City you can feel the importance, but in terms of the table it's just another three points, that's the truth."
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