Kai Havertz has been advised by Dietmar Hamann that Chelsea would be the obvious transfer option for him if he faced a choice between the Blues and Manchester United.
The Bayer Leverkusen starlet has emerged as one of the most sought-after talents in European football.
Sides from across the continent are monitoring both his development and situation in Germany.
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Premier League suitors appear to be heading the chase for his signature, with it also suggested that Liverpool boss Jurgen Klopp may be tempted to join the clamour for a fellow countryman.