The 25-year old Guinea-Bissau-born Portugal international is attracting interest from the likes of Everton and Tottenham but says he is keen to stay at Sporting to at least see out his current contract.
"I have a contract and I am happy at Sporting," he said.
"Things depend on the club. If there is something that is very good for me and for the club, we will see.
"But nothing has appeared and I am pleased to read that I am an important element for next season. I am happy here, I want to help Sporting to secure a title."