Chelsea thrashed Schalke 5-0 in Germany this week.
"I look at this Chelsea and there's no weak spots, they are very stable and based on this contest you can say that they can win the Champions League," said Ballack.
"And based on the season so far, that's also all you can say.
"But they also know at Chelsea and Mourinho has too much experience to let people get carried away."
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