City suffer defeat at Goodison Park, as a solitary Joleon Lescott goal hands Everton all three points.
The future City defender slides home Mikel Arteta's delivery just after the half-hour mark, after the visitors fail to clear.
The result sees the Toffees climb above Sven-Goran Eriksson's side into fifth place in the Premier League.
City record a sixth successive Premier League victory, defeating Newcastle United 2-0 to return to the top of the table.
An early goal from Edin Dzeko and second deep into injury time from Alvaro Negredo settle a feisty affair at St. James' Park.
Joe Hart and Aleks Kolarov in particular are excellent throughout as the away side extend our unbeaten run to 15 matches against a pumped up Magpies and record a first clean sheet in the league away from home since September.
Sergio Aguero scores a hat-trick, as ruthless City thrash Aston Villa 6-1 at Villa Park.
In the process, Kun becomes the greatest overseas goalscorer and sets a new benchmark for Premier League trebles.
Riyad Mahrez opens the scoring on 18 minutes with a fine individual goal before doubling the lead just six minutes later, finishing emphatically from close range.
The visitors make it three in 10 minutes when Aguero rifles a 20-yard shot into the top left-hand corner to virtually end the contest with less than half an hour played.
Gabriel Jesus adds a fourth on the brink of half-time before Aguero becomes the Premier League’s greatest overseas goalscorer with his second goal of the night on 57 minutes, wriggling past a couple of challenges and burying a low shot into the bottom corner from 15 yards.
Aguero completes his record haul of hat-tricks nine minutes from time to cap a memorable day for him and City.
Get the Official Manchester City Start page for your Chrome browser. Add the extension to your browser, for the latest news and wallpapers in your desktop tab.