The midfielder was powerless to prevent Arsenal from winning all three points, leaving the specialist wondering what exactly he offers to the midfield of the Blues.
Rio Ferdinand singled out Chelsea midfielder Jorginho for fierce criticism after the Blues went to Arsenal on Saturday with six points.
Maurizio Sarri's men could have extended the lead over the Gunners to nine points by winning at Emirates Stadium.
Instead, the current occupants of fourth place in the fourth division of the Champions League saw their advantage be reduced to three, when they lost 2-0 in a disappointing performance.
Alexandre Lacazette opened the scoring early on before Laurent Koscielny hit the second with a deflected end at the end of the interval.
Chelsea's attacking shortcomings, meanwhile, were again exposed by scoring a solitary kick on Bernd Leno's goal in the 90th minute.
Blues supporters hope that the imminent arrival of Gonzalo Higuain will strengthen the team on that front – but Ferdinand believes his problems start lower in the field.
"Jorginho is someone who sets the pace of the game. You get the ball to him in the middle of the field, he's very good, "he fired at BT Sport.
"How many assists did he get this season? About 2000 passes, do not watch.
"He's not a great defender. Once again, in a game like this against a great team, he is outgrown in midfield.
"He can not run.
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"So he does not give you anything defensively, and he does not give you anything on the other side of the field."
Chelsea will have a chance to recover in two successive qualifying rounds as the second game between the Carabao Cup semi-finals at home against Tottenham (where they will try to undercut a deficit) is followed by a FA Cup match against or Sheffield Wednesday. .
The Blues are back in the Premier League on January 30 in Bournemouth, where with Arsenal and Manchester United, the victory will be enough to keep hope in the Champions League.