Chelsea have made an enquiry for long-term target and Bayern Munich forward Mathys Tel.
The Stamford Bridge club made overtures regarding a move for France Under 21 striker last summer and have followed up their interest with a further enquiry this month.
Tel, 19, is viewed as one of the best young forwards in European football and would cost in-excess of £40million.
Intriguingly, Bayern are understood to have monitored the situation of Chelsea forward Christopher Nkunku, though as of yet no swap deal has been discussed or offered by the Blues. It is understood Nkunku would be open to joining Bayern if the opportunity presented itself.