Jose Mourinho said he did 'nothing to make that happen' after his striker was left out of the national side, following a series of injury problems to his hamstring and pelvis.
Mourinho has said that he did nothing to influence the decision of the Spanish FA but admitted he was pleased that Costa will not play in the internationals against Belarus and Germany.
He told reporters at his pre-match press conference: "In the 15 days (international break) he can rest and work. It is fantastic news for us. I thank the Spain FA for the decision that they made.
"The plan is to have period of complete rest after the match for a few days, and after that to continue the specific work he is doing without having a match to play on the weekend."
The Chelsea manager also confirmed that striker Loic Remy has returned to training after injuring his groin against Maribor two weeks ago.
Mourinho has said that Liverpool are still in the title race despite a stuttering start to the season that sees a 12 point difference between the two teams, with Chelsea going to Anfield having only dropped four points so far this season, and he said he enjoys the atmosphere generated at Anfield despite certain factors that may have worked against opposing teams in the past.
The Chelsea manager said there is plenty of potential in Liverpool's squad after they signed nine players during the summer following the sale of Luis Suarez for £75 million to Barcelona.
He added: "The crowd can influence the match in a big way at Anfield. I like to play there, but I have to say that some people feel the atmosphere in a negative way, but that's not my case. I like it, and it doesn't affect my players' performance, but in the past we have clear examples of it affecting other performances, goals that are not goal, penalties that are not given.
"I think Liverpool have to think about this season. I think they have enough motivation. I think if I was in that position I would go back to last season for the good memories, all the great matches they played."