If I decide to bet with high odds for potential most surprising winners, I will choose Borrussia Dortmund or Napoli. The reasons behind this decision are they both have a strong and young team. When people are young, they have more desire and more strength to do amazing things. But as always, Champions League is a tough one and to win the trophy, team have to get enough combinations at the same season: Excellent performance, luckiness with physical fitness for the whole team especially key players, and referee decisions. Even we have supports from VARs, referee decisions are the ultimate and most important one for each match.