Sterling scored in the 4-0 rout.
Guardiola enthused: “With and without the ball, he is so aggressive and so intense.
“I like the most how clear he is becoming like a football player. He knows when he has to dribble and when he has to pass.
“Before, he was only dribbling and that was a mistake.
“He is enjoying scoring goals. Before, I think he was a bit scared.
“He is a young player and important player for the national team. The most difficult thing with footballers at that age is to maintain that level of sevens and eights."