There is always a point in a season when the teams who dream of being champions have to prove themselves to be the real deal.
In those moments when things are difficult you have to put your head down and fight. To show that you are the best around, you grind out wins with last-gasp goals and clean sheets to demonstrate that your hunger matches your ability.
This is where Chelsea now find themselves. They began the campaign like a runaway train, clearly thriving from the confidence that winning the Champions League gave them in May, but the last few weeks have been challenging.