A 93rd-minute winner saw the Brazilian hand all three points to his new side as Spurs finally breached a standout display from Cardiff City goalkeeper David Marshall
The midfielder back-heeled fellow summer signing Erik Lamela’s low cross to beat David Marshall in the 93rd minute as the newly promoted side's resolute defensive was breached at the 29th attempt.
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"I’m delighted because we played so well and it was important to get the three points," he told the club's official website.
"It’s my first goal in the Premier League and I want to say thanks to everyone. I’m so happy.
"When I scored I went to the fans because our fans are the best. I feel very good, a little tired but very happy!"
Paulinho has featured in all five of Spurs’ Premier League fixtures this season, making a man-of-the-match performance on debut against Crystal Palace.
Andre Villas-Boas’ men are flying high in the Premier League with a return of 12 points from a possible 15 leaving them level on points with first-placed Arsenal.