Charles de Ketelaere will leave Milan after only one year at San Siro.
The talented Belgian midfielder has failed to make a mark at San Siro, despite Milan spending 35 million euros on his transfer from Club Brugge.
The 22-year-old played 40 matches in all competitions with Milan, not scoring a single goal and assisting only one.
The Belgian representative will leave on loan from the Rossoneri, but he will remain part of the Italian Serie A football elite.
Atalanta has won the competition for his services and now the details of the agreement between the two clubs have become known.
Bergamo will pay three million euros for the loan of the player, while they have the purchase clause for 23 million euros after one year.
Milan will also keep 10 percent of the card in case De Ketelaere is sold in the future.