Life, death, taxes - and Chelsea beating Fulham in the Premier League. That's the way it's supposed to be. That's the way it's been ever since the Cottagers last avoided defeat against their dominant, less sophisticated neighbours all the way back in 2012.
But this isn't the Chelsea of old. This Blues team has a soft underbelly, don't know how to finish their chances and now look at their lowest ebb in recent history.
The 2-1 loss didn't always feel inevitable. The inclusion of new signing Joao Felix gave Graham Potter's team something resembling a fresh impetus in the opening exchanges, and even with Fulham entering half-time 1-0 up - thanks to a goal from former Stamford Bridge hero Willian - it felt like they could recover.
Those hopes increased when Kalidou Koulibaly bundled home, but things went very wrong very quickly after that. Clearly infected by the virus that is Chelsea's recent malaise, Felix left his brain in the dressing room and flew into a studs-up tackle on Kenny Tete. It resulted in him becoming the first Chelsea player to be sent off on his Premier League debut.
It was Fulham's game to win from there and they delivered - with Aleksandar Mitrovic stand-in Carlos Vinicius losing his man and powering a header home.
Defeat for Chelsea then. Just their eighth ever against Fulham, and their second in the Premier League era. We think you call that rock bottom.
Below, GOAL takes a look at the Chelsea winners and losers from a damaging night at Craven Cottage.