Chelsea are living in a recurring nightmare when playing at Stamford Bridge.
Another visit of Brentford, another win for the Bees, another home loss. Dance music blared from the away dressing room after the match as they celebrated their third successive win in the derby.
This stadium is more Brentford's home than Chelsea's. The Bees have now won twice here in the last seven months, Chelsea have won one.
Mauricio Pochettino is now under more pressure going into his hostile homecoming against rivals Tottenham next week, who are top of the table having gone unbeaten this season and are 14 points clear of their rivals.
The problems extend beyond the dugout, despite assistant Jesus Perez getting sent off for rowing with the opposition bench. It runs through the whole club.
Nizaar Kinsella assesses three disappointing points behind the shock result.
Let's talk about the poor finishing
Jackson, in particular, looks lost up front and his lack of presence is becoming a hard problem to solve amid pressure on both him and the team more broadly.
In the second half, the young squad panicked and stopped creating. It's a tale seemingly as old as the Boehly-Clearlake ownership but it needs to be resolved to avoid a season like last year.
Cole Palmer's excellence
An outstanding playmaking display was the main shining light on a disappointing afternoon.
The 21-year-old was heads and shoulders above any of his teammates but saw the chances he created squandered.
Skillful dribbles, clever movement and excellent crossing produced great chances but they weren't taken. He was the least at fault for defeat on Saturday afternoon.
Can Pochettino turn the tide?
Pochettino will need to build some swagger at Stamford Bridge if he is to be successful.
Chelsea have only beaten Luton Town since he took charge and the atmosphere could turn on him as it has for managers in the past.
He remains in a honeymoon period but a defeat away at Tottenham next week would be yet more pain for the fan base.