The Dutchman insists that this is normal practice before every game his teams play where he goes over every potential pitfall in his head.
The Blues boss also admits that playing right-sided Jose Bosingwa at left-back is causing him the biggest headache.
However, the real test at the Camp Nou this week is likely to be Chelsea's toughest match of the season as they take on many peoples tip for the trophy.
"You have to think ahead and I have played Barcelona twice in my head," he told The Sun.
"In my head, I have never lost a game in preparation. But you have to focus a lot on the difficulty and the complexity of the job Bosingwa has to do.
"In my opinion, Bosingwa is playing one of the most attractive players in the world."
The Russian coach also highlighted that playing against Barcelona is a lot different to playing the likes of Manchester United and Liverpool in the Premier League.
Pinball"Although they like to attack, we like to attack as well, but when you play Manchester United or Liverpool, it is a less controlled game and can go either way. Like pinball," he added.
"When you play Liverpool or United or they play us, the pace of the game can go up any second. Boom.
"But Barca are very smart. They can turn the pace of the game up or down. You think you are in control and then all of a sudden they strike.
"They are skilful and have very good possession and can frustrate a team by having possession.
"We must not get frustrated. If they score then we must have the confidence that we can score at any moment."
Meanwhile, Florent Malouda believes Chelsea's away win at Liverpool in the quarter-finals has given them the confidence to go and get a result in Spain.
"Barca are not used to the pressure we are capable of putting on them," he said.
"Our win at Liverpool is an inspiration for us."