The Portugal international rejoined his former side as part of the deal which took Marcos Rojo to Old Trafford last summer.
Nani was in good form as Sporting clinched a third-place finish behind Porto and Benfica, scoring 7 goals in 27 domestic appearances.
However, the 28-year-old's United future is unclear following the arrival of PSV Eindhoven's Memphis Depay.
Turkish club Fenerbahce are believed to be leading the race for his signature, while Sporting's city rivals Benfica are also interested.
GETTY
Nani looks likely to leave Manchester United this summer
To the fans of Sporting, I do not intend to go to Benfica
Nani
But Nani has assured fans that he won't be moving to Lisbon's other club, adding that his future should be decided in the coming days.
He said: "My future is not yet clear, but it could be clarified in the coming days. To the fans of Sporting, I do not intend to go to Benfica."
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