Just when you think you have won your first game as Arsenal boss, along comes a calamity keeper to take the Mikel.
At least Bernd Leno is consistent. He has now made seven errors leading to goals in the Premier League – more than any other player since August 2018.
But his latest was a real howler as he flapped at a routine cross with Arsenal on the verge of winning for the first time under Mikel Arteta on his home debut in the dug-out.
They had led through Pierre-Emerick Aubameyang and looked well in control until Leno’s howler gifted an equaliser to Jorginho.
But worse was to come when Arsenal got caught pressing for a winner and Tammy Abraham ended a three-match goal drought by scoring the winner through Leno’s legs on the break.
So it ended up being a case of meet the new boss, same as the old boss for the Gunners, who have now managed just one win in 15 games.
And the stats made grim reading as this was the first time Arsenal had lost four in a row at home for 60 years.
But Chelsea won’t care. Frank Lampard was under pressure after losing at home to Southampton and his side bounced back in style… eventually.
Calum Chambers, just back from a ban, helped create the opener, nodding on a corner from Mesut Ozil for Aubameyang to head home from close range.
At this point Chelsea looked lost. But they caught a break when Arsenal lost a limping Chambers to injury, forcing Shkodran Mustafi into action off the bench in the 23rd minute.
Frank Lampard celebrated the win over Arsenal with the Chelsea fans
Tammy Abraham wanted a penalty when he was tugged back on the edge of the box by Matteo Guendouzi, but referee Craig Pawson ignored his appeals.
That was a stroke of luck for Guendouzi, who had already been booked for bringing down Willian earlier in the game.
Lampard had abandoned his three-at-the-back formation by the 34th minute, sending on Jorginho for Emerson, who…