Speaking to Deportes Uno, the 17-year-old expressed his excitement about competing in the 2025 Copa Libertadores with Cerro Porteno, while also addressing his links with United. He said: "I’ve read about Manchester United’s link with me, I don’t know anything. Everything is handled by my agent. I spent four years preparing for this opportunity, you have to take advantage of it when it comes. Now I’m thinking about everything that happened this season. The night before the debut I couldn’t sleep because of the excitement."
Juan Carlos Pettengill, vice-president of Cerro Porteno, has added: “Diego Leon will play this season at Cerro. He can’t leave before he turns 18 years old.”