Pundits Rio Ferdinand, Martin Keown and Joe Cole laid into Arsenal's calamity duo Shkodran Mustafi and David Luiz after they gifted Chelsea the opening goal on Tuesday night.
Mustafi did not get enough on his back pass to goalkeeper Bernd Leno and Chelsea striker Tammy Abraham got to the ball first.
Luiz tried to make amends for his centre back partner's error but after Abraham had taken the ball around Leno the Brazilian brought down the forward with an open goal in front of him.
Luiz was shown a straight red card and Chelsea were awarded a penalty on the half-hour mark by referee Stuart Attwell as Abraham was denied a goalscoring opportunity.