Chelsea won the competition for the first time last year but are now bidding to become the first team in the Champions League era to retain the title.
“It’s proven, so far, impossible for anyone to win it twice,” Di Matteo said.
“We’ll try to do the impossible.”
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Summer 2016 is set to be a very exciting time for football fans, as this is when the long awaited Euro 2016 tournament kicks off.
Since Guus Hiddink arrived at the helm, Chelsea have improved considerably after a tricky start to the campaign.