Chelsea are ready to test Lazio's resolve with a major bid for Stefan de Vrij.
Blues manager Antonio Conte feels his squad is a centre-half short and is ready to settle on De Vrij for the winter market.
Corriere dello Sport says Chelsea are preparing a €35 million offer to convince Lazio to sell.
De Vrij's current deal runs to 2021.
Along with Chelsea, the Dutchman is also interesting Bayern Munich and Real Madrid.