This season, Farke's self-stated remit was to collect 38 points, or a point per game, a total that has proven enough to retain top-flight status every season since 2011-12.

Up until last weekend's defeat by Aston Villa, Farke was fulfilling that ratio, but he has suffered a change in wind direction among his own fans. It's a moment most managers would recognise, having been through it themselves.

What is most worrying about this change is that for the first time - even though, in my opinion, his team were playing really well against Villa - part of the crowd behaved in a very negative way towards him.

They showed their feelings about his team selection and substitutes, quite openly.

I have said in my previous columns that the game I love is all about the players and its supporters, but I will make a distinction here.

If fans on social media sites criticise a team, manager or club, it resonates in only a minor way compared to the effect of the same criticism from supporters who buy season tickets and spend their hard-earned cash and time watching and travelling home and away in all weathers.

In my experience, a lot of these supporters have a great understanding and knowledge of their team and the players, and have the right to criticise. Their reaction also has far more influence on the decision-makers at any club.

So, if you hear criticism openly in your own stadium like Farke did on Sunday, it means you are in trouble and that results must start changing quite quickly, especially in the Premier League.