6 things we learned as the Champions League returned with plenty of drama

Jurgen Klopp (centre) admitted the defeat in Naples leaves Liverpool with “lots of soul searching” (Agostino Gemito/PA)

The Champions League returned this week as last season’s runners-up Liverpool got off to a nightmare start in Naples, while Chelsea’s unexpected defeat away to Dinamo Zagreb proved Thomas Tuchel’s last stand.

Here, we take a look at what we learned from matchday one.