Rosicky believes the 18-year-old, who won his first senior England cap at the start of the season, takes everything in his stride.
"He is a great talent. For his age, he has a great brain and a big future," said the Czech Republic international.
"When Jack has got the ball, he is very calm. That is something young players sometimes don't have, they panic a little bit.
"With him you don't see it because he is very comfortable with the ball and that is the first quality you are looking for."