After emerging as one of the top talents in European football, Sanches was sent to the Welsh club by Bayern Munich with the intention of gaining regular first-team football.
However, Sanches, then 20 years of age, made just 12 appearances in the Premier League, and the Portuguese has now suggested that he had no desire to spend a campaign at the Liberty Stadium.
The player told L'Equipe: "It was not my choice to go to Swansea. I was forced to go there. I didn't want to go. I have respect for the club, the players, all the people I met there. I appreciated their humility.
"They gave me everything, but I did not want to be there. The most difficult moment? When I was injured, I couldn't train."
Sanches is now settled at Lille, making making 18 starts and seven substitute outings in all competitions since joining the club in August.