#3 Andrea Pirlo (Juventus)
When Andrea Pirlo was appointed as the first-team manager at Juventus, several eyebrows were raised. The Bianconeri had sacked Maurizio Sarri despite winning the Scudetto and appointed a novice with no experience of coaching at the highest level.
Given that the level of expectation was set at Juventus with the sacking of Sarri, it is hard to see how the hierarchy will show any kind of patience with Pirlo if results continue to remain patchy.
Even though Juventus have two games in hand, they are ten points behind Serie A leader AC Milan. In addition, the UEFA Champions League represents an acid test for Pirlo.
Even if Juventus fail to win the Serie A title this season, if Pirlo leads them to glory in Europe, that would cement his stature at the club. However, with the way they have performed so far this season, it seems unlikely that Juventus would pose a threat to the big teams in the competition like Manchester City or Bayern Munich, to name a few.
#2 Frank Lampard (Chelsea)
Frank Lampard is already under immense pressure at Chelsea. The Blues are ninth in the Premier League, with just 26 points from 17 games.
Lampard has the worst win percentage of any Chelsea manager in the Roman Abramovich era. So despite his status as a club legend, patience at the top is likely to be wearing thin already.
Especially when you consider that Chelsea spent around £250m on new acquisitions in the summer, Lampard's position is justifiably under threat for the way the club has performed so far this season.
The former Chelsea midfielder has been unable to get the best out of his big new attacking signings in Timo Werner and Kai Havertz. In addition, the defence, which showed signs of improvement at the start of the season, has once again started leaking goals, which is not a positive sign at all.
#1 Pep Guardiola (Manchester City)
This is our most controversial entry in this list, as Pep Guardiola has only signed an extension to his contract at Manchester City this season.
However, the Spaniard's position could well come under threat by the end of the season. Last season, City finished 18 points off Liverpool in the Premier League title race. In addition, they also lost to Lyon in the quarter-final of the UEFA Champions League.
This season, they are definitely involved in a title race at this point. However, there is still more than half the season left to play, and Guardiola's big test will come in the Champions League again.
He has not yet led City past the quarter-final stage in the competition and has a point to prove himself, as he is yet to win the Champions League while managing a side without Lionel Messi.
If Manchester City do endure another season with just a domestic cup or two to show for their efforts, then it is plausible that Pep Guardiola's job could come under threat.