Chelsea won 6-3 against Everton on Saturday in a match that surprised practically everyone who witnessed it.
It was truly one of those rare moments in Premier League history when fans cannot believe their eyes, when a game goes above and beyond anything that was expected.
After nine goals and two sides giving it their all, here are five things we learned about Chelsea following their thrilling win.
Costa is perfect for Chelsea
Gone are the days of Jose Mourinho bemoaning his lack of a world-class finisher. In the form of Diego Costa, the Blues have the perfect player to put the finishing touches to the excellent play from their creative midfielders.
Costa doubled his Chelsea tally with a brace against Everton, scoring in the first and the last minute to prove that it is never too early or too late for him to get on the score-sheet.
This side is full of goals
Costa may have netted two but there are goals throughout this Chelsea team and that can only be a good thing for the Blues as they look to challenge on all fronts.
Goals from Branislav Ivanovic, Nemanja Matic and Ramires saw Mourinho’s side rack up an impressive score and proved that it is not just the likes of Eden Hazard and Cesc Fabregas who will be additional goal-threats this season.
Fabregas is quietly superb
A fourth assist of the season for Cesc Fabregas may have gone unnoticed given the excitement of a nine-goal extravaganza, but the Spanish international’s influence should not be understated.
The former Barcelona player has slotted seamlessly into this Chelsea side and he will be every bit as influential as Costa in any success the Blues enjoy this season and beyond.
The defence must focus
Sometimes these games simply happen and all managers can do is embrace them, but Mourinho will not be happy shipping three goals against Everton and that is something he will be working hard to rectify in the weeks ahead.
Chelsea will need to be solid at the back as they look to challenge both domestically and in Europe.
A glimpse at Chelsea’s best XI
Football pundit Gary Neville believes the side Mourinho fielded on Saturday was Chelsea’s best, and given their performance it is hard to disagree.
The one thing that is certain is that Chelsea have considerable strength in depth, but they work so well with some of their underrated stars in the starting line-up, most notably Ramires and Willian.
They may not steal the headlines but they give their teammates the platform on which to shine.
What did you learn from Chelsea's win over Everton?