Cahill has been left out of the England squad to face the Netherlands and Italy having not played in Chelsea's recent Premier League matches with Manchester United and Manchester City, or in the Champions League tie against Barcelona.
Spain face Germany and Argentina in worldwide friendlies on March 23 and 27, and Lopetegui's squad for the World Cup - which is just three months away - is starting to take shape.
Spain announced their national squad ahead of the upcoming worldwide break and there is no place for the Blues 25-year-old, but club teammate Marcos Alonso has earned a call-up.
"We like (Rodri) a lot".
He said: "The World Cup is not tomorrow". Marcos is doing well and it would be good to see him train and compete with us.
Morata began strongly after he arrived at Chelsea in the summer but his form has deserted him and he has not scored since 26 December.
He said: "I think we have to try to do both".
"We are looking to get more information about players, (Morata) has had several problems, he has played little but his chances are intact". "But now he is back, although it doesn't mean he has a spot guaranteed (for the World Cup)".
"The fact players haven't been called is down to various things; form, injuries and also to see new players better". He remains in our thoughts and his chances of going to the World Cup remain intact. "We want to fight [for it]", said Conte, who looks set to play his strongest possible team at the King Power Stadium. Chelsea's Pedro Rodriguez and Victor "Vitolo" Machin were left out.