The Dutch striker is moving to Norwich City this summer and hit a brace in his final game for Sporting in victory over Beira-Mar.
"I've had two fantastic years.
"I leave the club with pride, but also a sad feeling.
"Leaving a club like Sporting and its people makes me sad. I will feel the absence, but you are forever in my heart. It was an honor to play here. Viva Sporting," said the 24-year-old striker.