The Belgian dazzler and Brazilian young gun have supplied plenty for the Blues forward line since joining from Lille and Internacional respectively and Cech feels they have added extra dimensions to Roberto Di Matteo's attacking line which is currently being led by Fernando Torres.
"You can see that the players who are in our attack have all got used to each other," he told Isport.blesk.cz.
"They are good attuned to each other even if they play together for the first time. Eden is great with his technique and with Oscar they are a dangerous duo.
"Moreover, the Brazilian and Spanish style of football is similar, so even Fernando Torres is used to it.
"That is why, even if there are a lot of new players, they have found the common language on the pitch."