Goals, assists and stunning performances in the Champions League made have made Karl one of the most watched teenage talents in the world at the moment.
At the age of just 17, Karl has enjoyed a breakthrough season at Bayern Munich as he fills in the gap that Jamal Musiala left after picking up a heartbreaking injury in preseason.
Karl became the youngest player to record a goal and assist for Bayern in the same game earlier this season, as well as being the youngest player to score in three successive Champions League matches.
Speaking to JeffBet, Hamann has suggested that Musiala may struggle to get back into the Bayern side whilst Karl is around, in what may be a huge problem for manager Vincent Kompany.
“He's taking all the headlines in Germany at the moment and carrying the attack. People are saying Kane is in Karl's shadow at the moment. Look at the game against Arsenal, Karl was the one who scored and was the most efficient player going forward.
“He's undroppable at the moment. If there was a Champions League semi-final or final tomorrow, Karl plays, Jamal Musiala, will need to work his way back into the team. The positive is that Musiala doesn't have to rush back from his injury. He'll have to do very well to replace Karl.”
Karl is the youngest player to record five Bundesliga goal involvements and the youngest Bayern Munich player to score in the Champions League. For Musiala to displace him will take the German to be at his very best, which may not come for months from now.