The 20-year-old made his bow as Derby County were defeated 3-0 at the iPro Stadium in the third round of the EFL Cup on Tuesday evening, earning praise from Jürgen Klopp for his performance alongside Lucas Leiva and Jordan Henderson in midfield.
After the match, the manager said of his young charge: "Marko had a wonderful debut - really good. He is a wonderfully skilled player."
Reflecting on that significant personal milestone, Grujic told Liverpoolfc.com: "It was an incredible night for me, making my first competitive start and a first win.
"It was a good game, a 3-0 against Derby, they are a good team.