The showpiece match will be played at the German side's home ground the Allianz Arena on
He told German tabloid newspaper Bild: "I think Barcelona would have been the only team capable of contesting a final abroad and winning it.
"It is a huge advantage when you are at home in a final, where a lot of emotions play a role. This is an emotional advantage that Chelsea cannot compensate for."
Ballack insists though that he is entirely neutral, adding: "I have my fingers crossed for both sides."
Fortuna Dusseldorf was relegated from the Bundesliga as Hoffenheim and Augsburg staged final-day escape acts.