German football have high hopes for the 19 year-old.
Merkel told Fifa.com: "I'd love to win the Euro and the World Cup, and I'd obviously really like to do that with Germany. But before any of that, my priority is AC Milan."
The Under-19 international added: "Lining up alongside these star names [Zlatan Ibrahimovic, Robinho and company at Milan] is a dream come true.
"I never thought this would happen, but I can learn so much from these players."