Unfortunately, and most depressingly, Manchester City - after 25 minutes - lead struggling Leicester by three goals to nil.
When examining possible reasons for Leicester's general loss of form (over the past few seasons), while one can look at the impact of wider changes to the game (such as nation states, or entities linked with nation states, buying football clubs), there has been - to my mind - an over-emphasis on the general decline of Vardy as a force.
While Vardy was of vital importance in the title winning team (a title win that took place all of seven years ago, and Vardy, who wasn't in the first flush of youth at the time, is now seven years older, thus, a loss of speed is inevitable), so, also were Mahrez, and - to my mind, - N'Golo Kanté, who were both sold subsequently, shortly after the team secured the title.
Now, although I think that Leicester have missed Kanté, (and his departure - to my mind - meant that mounting a successful challenge to retain the title had become much more difficult, and this is entirely apart from the significant transformations since undergone by other teams), I would argue that an even more recent departure, at the beginning of this season - that of goalkeeper Kasper Schmeichel - has been hugely detrimental to their chances of remaining in the Premier League.