Chelsea have declared that Marcos Alonso is worth €60m as they look to stave off interest from Real Madrid, according to reports.
Left-back Alonso has been linked with both Real and Atletico Madrid, with the Spanish transfer window open until the end of the month.
According to AS, Chelsea have moved to put off any potential suitors for Alonso by giving him a €60m (£54m) price tag.
Alonso came through the youth ranks at Real Madrid, and now the Champions League holders are interested in taking him back to the Bernabeu.
However, it is unlikely that a deal would be completed this month, with Maurizio Sarri identifying him as a key player at Stamford Bridge.
The former Fiorentina and Bolton Wanderers man capped off a man of the match performance against Arsenal at the weekend with a goal and an assist.
Alonso joined Chelsea from Fiorentina in 2016, and has scored 15 times and registered nine assists in his 84 appearances for the Blues in all competitions. He is under contract with the Blues until 2021.
Atletico are said to be seeking a new left-back as Filipe Luis nears a move to Paris Saint-Germain, while Real Madrid are also in the hunt for a new signings before the end of the month.