The 51-year-old said: "[The] young group is pushing hard. Bigirimana showed again that he is going to be a player for us and Ferguson and Sammy Ameobi [had] great games.
"[Shane Ferguson's] got one of those left foots you could peel an Orange with. He hit three fantastic crosses tonight and I'm an admirer of him, I like the way he plays the game.
"He's a forward thinking player who wants to constantly attack, and I think he has a big future at the club, as Sammy has."
Newcastle are three points clear at the top of Group D.