Luis left Atletico for Fla over the summer.
He told Marca: "I've seen him play a bit lately and he gave an assist against Eibar. He's strong, he's young and he wants to learn. More than anything, he's humble. I think he'll be the best full-back in their history. He has all it takes to be.
"The club don't only want talented players but also those with great human qualities. They've succeeded with Lodi."
Luis admits he had an offer to stay.
"I could have, but we spoke and everyone decided it was time to separate. The team are well covered in that position as well. I value the way they treated me until the last minute. I plan to return, I haven't even rented my house in Madrid because one day I want to go back and help coach the kids or anything at the club."