Arguably Thomas Tuchel's biggest task over the next few months will be trying to unlock Kai Havertz's full potential at Chelsea and he could well turn to the German national team to find his answer. When Chelsea won the battle for Havertz's signature last summer, the move was heralded as a huge coup for the Blues.
Against Switzerland back in October, Havertz played out wide and looked close to his best with a goal and assist.
Given the freedom to control Germany's attack, Havertz looks more expressive and relaxed on the ball.
And a huge part of that is due to Leon Goretzka's role for Germany playing just behind Havertz in midfield.
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Leon Goretzka compliments Kai Havertz perfectly with Germany (Image: GETTY)
The 26-year-old has enjoyed another strong season with Bayern Munich with his ability to be effective at both ends of the pitch.
But Goretzka's contract situation is yet to be resolved with the Bundesliga giants and his current deal expires in 2022.
That could make him available at a cut-price this summer with Bayern expected to undergo big changes with a number of players on expiring contracts.
And Goretzka's close relationship with Havertz in the German national team could well be the answer for Chelsea in unlocking the 21-year-old's full potential.