Full-time: Everton 3-1 Chelsea
- Steven Naismith replaces the injured Muhamed Besic after just nine minutes before notching a superb hat-trick
- Nemanja Matic scores with a superb long-range strike but Chelsea have now suffered their worst start to a season since 1988
- John Stones starts against Chelsea for the first time since being denied a £38m move to Stamford Bridge
A fine and deserved first home win of the season for Everton, who move up to fourth in the Premier League before their trip to Swansea next weekend. As for Chelsea, they were very utterly ineffective during that second half and remain extremely brittle in defence.
This is now their worst start to a season since 1988 and Mourinho's side host Arsenal on 19 September after a Champions League meeting at home to Maccabi Tel Aviv.
That is all for this particular blog, but join IBTimes UK here for live coverage of this afternoon's 1500 BST kick-offs. Goodbye.
Everton 3-1 Chelsea
Confusion in the Blues' defence as Terry, Zouma and Begovic fail to deal with a bouncing ball. Naismith lurks menacingly before taking a hefty whack on the head from the goalkeeper as he strives to clear his lines.
Funes Mori shows no sign of any debut nerves as he brings the ball out of defence with pace before being chopped down unceremoniously by Costa. A deserved yellow card for the striker.
Chelsea's wretched afternoon is summed up as Willian overhits a sweeping crossfield ball towards the run of Hazard. Four minutes of added time signalled by the fourth official.
A caution apiece as Stones is booked for kicking the ball away and Azpilicueta likewise for a rash foul on the wily Lennon.
Hazard clips the ball to the back post towards Falcao, but the substitute cannot get a proper purchase on his header and it's easy for Howard to claim.
Chelsea have monopolised the ball for parts of this second half but they have now been punished for their lack of creativity. Everton move the ball around sweetly through the likes of Stones, Lennon and Barkley, before the latter slips the ball behind the opposition's defences for Naismith.
Already on a brace, the 28-year-old stays cool to complete his first ever Premier League hat-trick by slotting home through the legs of Begovic. Surely game over now.
Goal: Everton 3-1 Chelsea (Steven Naismith)
Chelsea are enjoying a lot of possession and territory here without really creating too much by way of clear-cut chances. Willian frustrates his waiting teammates by sending a corner straight out of play.
Coleman tries his luck from the edge of the box but he cannot keep the effort down. The Republic of Ireland international looks to have picked up a knock in the process and is replaced by debutant Funes Mori.
A final roll of the dice for Chelsea as Cesc Fabregas is withdrawn and replaced by Willian.
A second Everton debut for ex-England winger Lennon, who comes on with just under 20 minutes of the match remaining. Kone jogs off.
Mourinho makes a second change as Radamel Falcao comes on for Pedro. Chelsea break forward once more through Ivanovic but Costa fails to get a shot away and a corner comes to nothing.
End-to-end stuff as Lukaku then gets caught in two minds whether to shoot or pick out Kone at the back post.
Begovic is called into action once more as Naismith finds Lukaku and the former Chelsea striker fires a shot straight at him. Azpilicueta is alert to turn the rebound behind.
Chelsea launch a swift counter attack after Kone's shot is saved by Begovic but unconvincing shouts for a penalty are ignored following a coming together between Naismith and Pedro.
Galloway is belatedly shown a yellow card for a crass foul on the Spaniard. That is the first booking of the afternoon.
Lukaku looks to take on Terry but his skewed cross-cum-shot is driven into the side netting.
A chance for Lukaku to restore Everton's lead is spurned as the powerful Belgian's low shot is parried by Begovic. The home crowd then appeal loudly for a pass back as Terry touches the ball to his goalkeeper under pressure.
Andre Marriner is unmoved, but that should have been given.
Coleman wins a corner for Everton. It's a good delivery from Barkley, but his header flies over Begovic's crossbar.
A first substitution of the day as 19-year-old Brazilian Kenedy, who finally joined Chelsea from Fluminese in August after a delay in securing a work permit, is introduced at the expense of Mikel.
An understandably attacking change from Mourinho as his side look to find an equaliser.
Chelsea are looking to sustain a bit of pressure as Zouma sees a shot blocked before going down with what looks like a knee issue following a tough challenge with the impressive Barry. Cahill is on the bench, remember.
A physical start to the second 45, with Barry and Matic in particular battling for their respective sides in midfield. A nervy moment for Begovic as he is forced to race out and clear an underhit backpass.
The second half is now underway. No personnel changes from either manager at the break.
An entertaining 45 minutes is brought to a close. After an even start, Naismith's introduction proved pivotal for Everton and his impressive run of goals against Chelsea has continued amid some woeful defending from the likes of Ivanovic.
The champions have grown into the game after a dismal start and there is an unlikely to be a better goal scored in the Premier League this weekend than that wonderful strike from Matic. Still plenty of time for the visitors to salvage this.
Everton 2-1 Chelsea