The midfielder, who was part of the Portuguese squad which won Euro 2016, claims he will leave Sporting for the Premier League in a reported £21m move in the current transfer window.
Silva looks likely to follow Sporting team-mate Islam Slimani to the King Power Stadium as Leicester bid to complete a double raid on the 2015/16 Portuguese League runners-up.
In an interview with Porto-based newspaper O Jogo, Silva said: “Yes, I confirm this proposal. Leicester is very interesting and corresponds to my career goals.
“After the past 15 years at Sporting, this opportunity is something exceptional for me and can allow me to express and impose myself in another championship, and also to evolve in the Premier League, which is a stunning league.
“I love Sporting as a family and I dedicated myself to the club since I was 12 years old.
“With Sporting I lived many moments of happiness. I can say that I grew up with the club. At 27 years old, and after so many years of loyalty, I think that no one will criticise me for wanting to embrace this challenge.”
Source: Sky-Sport Football