Lampard had already spoken of his desire for Chelsea to be more clinical after losing 1-0 at Newcastle on Saturday with Paris Saint-Germain’s all-time top goalscorer Edison Cavani a target.
And a move for the Uruguayan could be even more of a priority after top scorer Abraham had to be helped from the field at fulltime after injuring his ankle in colliding with the advertising boards late on.
Abraham had a big role to play on what should have been the decisive moment in the match when he pounced on a gift from Shkodran Mustafi to race clear on goal and round Bernd Leno.
Luiz got back in time to make a challenge, but barged Abraham to the ground and in the opinion of the referee did not make an attempt to play the ball as he saw red.
Jorginho produced a characteristically cool finish from the penalty spot and Chelsea should have been on course for a comfortable three points.
But the Blues have now won just four of their last 12 league games and were guilty of the same lack of creativity at one end, and defensive lapses at the other, that characterised the home defeats to West Ham, Bournemouth and Southampton.
Fortune also favoured Arsenal for their first equaliser midway through the second half as a slip from N’Golo Kante allowed Gabriel Martinelli to run from the edge of his own box unopposed before slotting home the 10th goal of an impressive debut season in England.
Chelsea were lacking the guile to unlock the 10 men in their search for a winner, but Arsenal’s good work was undone six minutes from time when they were caught cold by a quickly taken corner and Cesar Azpilicueta swept home Hudson-Odoi’s cross.
Arsenal were not to be denied as Hector Bellerin produced a magnificent finish on his weaker left foot from outside the area three minutes later.
