After an electrifying few weeks at Stamford Bridge, Thomas Tuchel and Chelsea were given a reality check on Wednesday night when they lost to London rivals Arsenal.
Emile Smith-Rowe's 16th minute strike was the difference and leaves the back door open for Liverpool and even West Ham to make one final push to sneak into the top four.
Chelsea have two cup finals and two tricky Premier League matches against Leicester and Aston Villa to navigate between now and the end of the season, so what does Tuchel need to keep in mind to ensure his fantastic start to life in England doesn't spectacularly flop?