Chelsea are set to go to war with Jose Mourinho's Real Madrid over the signing of Porto's Freddy Gaurin, according to talkSPORT.
The 25-year-old is subject from the two European giants, who are seen as the front runners for his signature.
Guarin was part of Andre Villas-Boas' side that won four trophies last season, and the current Chelsea manager's links with the player would make The Blues the favourites to land the Columbian.
However, after making just 22 appearances last season, and playing just 34 minutes of the Super Cup match with Vitoria Guimaraes, Guarin may be surplus to requirements in Portugal.
After failing in a bid to sign Radamel Falcoa and Joao Moutinho from his former club, Chelsea boss Villas-Boas is attempt a third bid for one of his former charges.
Chelsea are also hoping to rap up a deal for Romelu Lukaku those week after a deal reported to be around £19 million was agreed.