Next up are Arsenal at Wembley and Ballack admits the matches are coming thick and fast as Chelsea chase silverware on three fronts.
Related ArticlesWalcott in line for Arsenal pay dayVan Persie: Arsenal must beat LiverpoolFootball Quiz: Friday FiveQPR eye ScolariWenger in injury Cup headacheChampions League semi-finals: Key players"Reaching the Champions League semi-final has given us a confidence boost going into another big game," he said.
"We have to recover quickly because physically and mentally Liverpool was a very tough game.
"We thought it would be a little bit easier than it was but in football anything is possible and we had to accept it.
"Games like the Liverpool one help to build confidence even more.
"We know we have a good team spirit but if you lose your mind and your head is down and if you win, it goes up. That's normal.
"You could see against Liverpool that everyone was really proud. This has given us a big boost for Arsenal.
"We have to come down a little bit now. We had a little time to celebrate beating Liverpool, but from Wednesday we had to focus on Arsenal.
"Everybody has experience in this squad and we know that at this time of the year we have a lot of important games if you come through in the Champions League and FA Cup."
Ballack is looking forward to his duel with Arsenal midfielder Cesc Fabregas, who has been in fine form since returning from a knee injury.
"Sometimes being injured helps you to recover and prepare for the upcoming weeks - that's what you can see now from Cesc," he said.
"He is back and straight away he is playing well, just like Michael Essien has been for us.
"We know Cesc is a good player and in this situation we have to be aware."