#3 Calamity at both ends results in two quick goals
It was turning out to be a measured started to the second half for Chelsea before Antonio Rudiger endured a howler at the back.
The German international was in line with a loose ball in his own box, under pressure from the Blades forwards. However, in the ensuing miscommunication with Edouard Mendy, Rudiger passed the ball into the back of his own net while his keeper was marching towards it.
However, moments later, Mount's pressure on Lowe resulted in a sloppy backpass that broke the shackles for a lively Werner. Aaron Ramsdale denied the striker a clear goalscoring chance by taking him down, which after a VAR check, was deemed as a penalty.
Jorginho stepped up with his traditional hop-skip style, placing the ball imperiously past the hosts' keeper.
#4 Smart game-management from Chelsea caps off three points
Chelsea have now claimed ten points from their four games under Tuchel, and it's safe to say that they have largely dominated on all occasions.
It was the same against Sheffield; Chelsea worked the ball around extremely well just when Sheffield morphed into a back four and had three strikers on the pitch.
The Blues had their moments to dart forward, but chose to utilise the runners and pass around with conviction, thereby robbing the Blades of possession.
The fact that Sheffield moved to a four-man defence also allowed Chelsea to use spaces down the right-hand side, where N'Golo Kante was introduced as the final substitute.
Despite a couple of late scares from Billy Sharp and David McGoldrick, Chelsea saw off Sheffield United with ease.
#5 Timo Werner was on top of his game against Sheffield
His goal drought has still not ended, but Timo Werner was arguably Chelsea's best player on the pitch.
The forward was his side's only attacking outlet early on when they lacked ideas, but Werner continually ran in behind the Sheffield United backline and looked very sharp in possession. He established close control with the ball and always aimed to drift infield, with Ben Chilwell providing the width.
Werner's cut-back for Mount was sublime, and so was his presence of mind to pounce on a backpass that led to the penalty.
This performance was a clear demonstration for strikers who go through grey patches - work hard, play to one's strengths and run the races while questioning the opposition's shape.