Almost as few people would have seen this result coming as those who predicted Leicester City winning the title last season.
The champions ripped Manchester City apart in the first half, Jamie Vardy and Andy King making it 2-0 after five minutes before Vardy skipped through the non-existent City defence to make it three after half an hour, and four in the second half.
Manchester City, who stay four points behind leaders Arsenal, made the scoreline more respectable through an Aleksandr Kolarov free-kick and a late Nolito finish.
Sportsmail's Laurie Whitwell was at the King Power Stadium to rate the performances of both sets of players.