Chelsea missed out on Porto fullback Alvaro Pereira yesterday.
Chelsea were unable to reach an agreement with Porto before the 11pm deadline.
Their final offer of £16 million had been rejected by Porto, which were demanding closer to £28 million.
Porto now face the prospect of having a very unhappy Pereira on their hands, with the Uruguay international having had his heart set on joining Andre Villas-Boas at Stamford Bridge.
It's the home stretch! 24/7 click for the best coverage of Chelsea's final transfer market moves