Leonardo has much to prove on his return to Paris Saint-Germain as the club's new sporting director, according to Willy Sagnol.
During Leonardo's previous spell as sporting director, stars such as Zlatan Ibrahimovic, Thiago Silva and Marco Verratti were all brought in, the latter signed from Pescara when still a teenager.
"He got Marco Verratti and that is very good, but today you are in a dynamic where you are in a much more targeted recruitment.
"To judge Leonardo, we must judge what he did.
"In Milan, they spent €200 million not to qualify for the Champions League and they found themselves out of the spotlight of financial fair play.
"Leonardo's last two experiences as a sports director, it was a lot of expense and not the expected results."
While some critics, such as Sagnol, remain skeptical about Leonardo's ability to deliver results in the transfer market, the Brazilian insists that he is "full of energy" for the job.
"I am really happy to come back to PSG once again," he said following the confirmation of acquisition.
"This club has been so important to me in my football career and in my life. I had really emotional moments here both as a player in the late 90s and more recently as sporting director along with our chairman Nasser Al-Khelaifi on my return to the club in 2011.
"Today, I come back to Paris full of energy to rejoin this club that I deeply respect."