"I feel like I have had so much experience and yet I am still only young and learning. Watching someone like Serge Gnabry develop is a big help," the Wales international, who celebrates his 20th birthday on Tuesday, told the Daily Mail.
"I saw his four goals for Bayern Munich against Tottenham in the Champions League. When he was 20, he couldn't get a game on loan at West Brom.
"He has shown you can push through if you keep working hard and hopefully I can do something like he's done."