On the prospect of joining Jose Mourinho's Inter, Deco admitted: "Our relationship is excellent and that counts. But you have to evaluate other things. Inter are a great team, as are Chelsea, where several friends of mine play like Ricardo Carvalho, Paulo Ferreira and Hilario."
Portugal boss Luiz Felipe Scolari is also linked with the vacancy at Stamford Bridge.
Deco said: "I have great faith in him and our relationship couldn't be better."