Mellor believes Brewster is the most exciting youngster at Liverpool right now.
“Ben Woodburn is a Welsh international and still very young and there is a lot of excitement around him.
“I suppose the obvious one would be Rhian Brewster who had an untimely injury for a year but a Golden Boot winner in the Under-17 World Cup team, you see [Callum] Hudson-Odoi who burst on to the scene from that team, so did Jadon Sancho.
“Brewster has a big future if he can listen to Jurgen and the coaches at Liverpool, and the senior players there.
“The inspiration comes from the latest players coming through the academy, which is young Trent Alexander-Arnold, who is the one who has progressed through the academy and been absolutely superb and is still so young at only 20. He's the one who has done amazingly.
“Brewster is the one who really excites me because he can score goals, has the right attitude and listens to the coaching staff and Jurgen."