The Brazil international returned to his homeland after his Atletico contract expired at the end of June.
However, the ex-Chelsea defender could have ended up at Manchester City having held discussions with the Premier League champions about a move to the Etihad Stadium.
“At the end I had three or four proposals in hand, and then you have to choose,” Luis told Globo Esporte.
“I closed some important doors, like Borussia Dortmund, which was a very good offer but I didn’t feel it in my heart.
“From January until March I had [talks with] Manchester City, but it didn't work out. There were offers from Turkey, China and a number of countries that called, but none of them filled the heart at that time.”
Manchester City signed Joao Cancelo from Juventus earlier this month to provide competition at full-back.
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