Leicester went to the Etihad Stadium as massive underdogs, but they put in a wonderful performance to claim the victory.
Defender Robert Huth scored an unlikely double and Mahrez netted a fine individual strike as Leicester moved five points clear at the top of the Premier League table.
The Foxes are continuing to defy expectations, and Mahrez’s simple message on social media rather sums of the feelings around the King Power Stadium at the moment.
Leicester only narrowly avoided relegation last term, but they have lost just two of their first 25 league matches this season to establish an impressive lead at the top of the table.
Claudio Ranieri’s side have proved a huge threat throughout the campaign so far, and they are now the bookies’ favourites to life the Premier League title in May.
Leicester take on Arsenal on Sunday, and if they are able to beat the Gunners they will move eight points clear of Arsene Wenger’s side, taking another big step to a potential title win in the process.