Chelsea boss Jose Mourinho has identified Real Madrid star Raphael Varane as his first choice transfer target - but he'll quickly move to other targets if he can't get his man.
According to the Daily Express, although the Chelsea manager has allowed Tomas Kalas to join Cologne on loan this week, he still intends to add to his defensive options.
Kurt Zouma, a January signing form St Etienne, will be allowed to continue his development away from Stamford Bridge but Mourinho is eyeing three potential defensive additions.
French international Varane is his first choice, and the centre-back has a £25m release clause in his Real Madrid contract.
He played under Mourinho at the Bernabeu, and the current Chelsea manger recently lavished praise on the 21-year-old, calling him one of the best young players in the world.
But if Varane chooses to snub interest from Chelsea the report claims Mourinho will turn his attention to one of Eliaquim Mangala or Medhi Benatia.
Porto's Mangala has been heavily linked with Manchester City but is reportedly holding out for a move to Chelsea or Manchester United. Benatia, who currently plays his football for Roma in Serie A, is another reported City target.
One of the main reasons why Mourinho has targeted Varane ahead of the other two is the fact that Mangala and Benatia are both valued at £35m by their respective clubs.