The pair are now hunting down Barcelona in the race for the LaLiga title.
Luis told Marca: "I think that neither Diego nor I regret having left, but I always wanted to return, I've been here in the best years of Atletico's history and you experience moments that are unthinkable in other teams... 2012 to 2014 was unique. I had the opportunity to return and I took advantage of it, to try to make my life here, my career in the club I love. Antoine can think like us and write his name in the history of the club.
"The club is getting bigger, striving to sign great players... we are proud to belong to this team."