There was a huge sense of relief around Stamford Bridge when Chelsea put Watford to the sword on Saturday.
The Blues had endured a difficult spell with defeats to Manchester City and Crystal Palace as well as the shock surrender of a 2-0 lead against AS Roma.
The Carabao Cup looked to offer a simpler chance to elongate their return to form but an Everton side under new management was never going to prove the easiest of tasks.
That was reflected in a trying first-half in west London that saw Chelsea trudge their way to a 1-0 lead with the Toffees warming the hands of Willy Caballero.
Antonio Rudiger headed home his first goal for the club having reason well to meet Charly Musonda's pin-point cross.
The provider of that very goal has been quite the talking point at Chelsea recently.
The Belgian penned a passionate Instagram post about the club's academy and Antonio Conte needed to intervene and discipline the young star.
Musonda has impressed in the performances he's made since that wobble and was arguably the club's best player against Palace - leading many to demand more game time for him.
However, it wasn't Musonda who was lapping up the plaudits at Chelsea on this particular occasion with supporters waxing lyrical of Davide Zappacosta.
The Italian is yet to start in the Premier League and has played behind Victor Moses but imposed everybody with his barraging runs against Everton. Check out the reaction:
There's fans being impressed and then there's fan being impressed.
Zappacosta put in quite the shift even if the tweets of some Chelsea supporters are borderline superlative. It definitely raises the question as to whether he deserves to start.
If he plays as he did against Everton every week, then it's not even a question.
Do you think David Zappacosta deserves to start for Chelsea? Have your say in the comments section below.
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