#3 Chelsea's back-three and wing-backs still the key to their supremacy
Despite injuries to Romelu Lukaku and Timo Werner, Chelsea's goals haven't stopped. They have had a new goalscorer almost every weekend. With 17 different goalscorers already this season, Chelsea have showcased the remarkable quality and versatility.
A lot of that has come about due to the involvement of the back three and the wing-backs in offensive plays. That aspect of Chelsea was on full display, as two of their three goals on the night came from a centre-back and a wing-back.
With Reece James and Trevoh Chalobah getting on the scoresheet, Ben Chilwell and Antonio Rudiger also came close with set-pieces in the first half. The high-flying role for James and Chilwell seems to have instilled a different level of confidence in both the Englishmen.
Chelsea are now a team that can score goals from every kind of play or situation during a game. And the goals can come from anywhere on the pitch, so the goalscoring return of Werner was a welcome sight.
#2 Juventus' stuttering start to the season continues
Juventus have struggled in Serie A under the returning Massimiliano Allegri, sitting a lowly eighth after 13 games. It's one of their worst starts to a Serie A campaign in six decades.
However, they enjoyed much better fortunes in the Champions League. They won their first four games, including against Chelsea at home, to qualify for the knockouts.
However, the Bianconeri received a rude jolt on their visit to Stamford Bridge. Coming into this game, Juventus had scored nine and conceded just two. Despite their promising returns in Europe this season, Allegri's men conceded four unanswered goals on the night after ending the first half only a goal down. They left the Bridge ceding top spot in the group and seeing their significant goal difference get whittled down to only three.
Juventus were plain terrible at the back. Especially during Callum Hudson-Odoi's goal at the hour-mark, when Ruben Loftus-Cheek danced his way through seven Juventus players to serve the goal on a platter for his former academy teammate. There was no respite, as the returning Timo Werner scored from a tap-in after coming on for the final 15 minutes.
With Juventus expected to finish second now, Massimiliano Allegri will hope to address his team's issues ahead of the knockouts.
#1 Victory comes at a price for the reigning champions
Chelsea might just have done enough to secure the coveted top spot in their Champions League group. But they had to pay a huge price for the same. The Blues lost two of their key men to injuries that might adversely affect them in their Premier League title challenge, which resumes this weekend.
While N'Golo Kante walked off with a hamstring injury early in the game, Ben Chilwell also endured a horrific injury. The England international had a nasty fall after colliding with his Juventus counterpart midway through the pitch. The ex-Leicester Cityman was seen grimacing in pain, and could be out for a while.
With Chelsea set to face Manchester United this Sunday, losing Kante and Chilwell to mid-term injuries couldn't have happened at a more inopportune time. Liverpool and Manchester City are breathing down Chelsea's necks, so Thomas Tuchel will need to rejig his tactics to keep his team ahead of the competition.