Whether or not Chelsea's B team was a good level of opposition, this looks good to me (click on the shot map):
We allowed some decent opportunities* and it's not unusual to lose to superior finishing/goalkeeping but, even if you take away Calvert-Lewin's goal at the end, it looks like we created the better chances.
* Not too much in the center of the box, though, which is promising.
It had a shape, which was an improvement. But interesting on several fronts.
Looks like doubling up with Kenny and Lennon, hampered their left side and limited Musonda's options and subsequently Batshuayi. While Mirallas left Zappacosta to play as right winger against Baines, without major effect.
We look the more unbalanced side, but they were dragged out of position. With Beni/Davies Lennon/Kenny both almost interchangeable and Mirallas as more direct 2nd striker or satellite in system. But Cahill is dragged out wide to cover threat on Chelsea's left, while Zappacosta created not a lot, despite advanced position and freedom.