Jamie Carragher is more qualified than most to give his opinion on defending.
The former Liverpool centre-back carved out a 17-year career in the Premier League, so he knows bad defending when he sees it.
And according to the Sky Sports pundit, it doesn't come much worse than the way Chelsea organised for the first Liverpool goal on Friday night.
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The Reds triumphed 2-1 at Stamford Bridge, courtesy of strikes from Dejan Lovren and Jordan Henderson.
There wasn't anything the hosts could have done about Henderson's stunning winner, but Lovren's goal will have caused a stir in the home dressing room.
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Antonio Conte's teams are known to be tactically shrewd, so the Italian will no doubt have been less than impressed when he spotted three Liverpool players left unmarked.
The Chelsea boss wasn't the only one dismayed by Chelsea's defensive work, with Carragher going on another of his classic rants on Sky Sports' coverage of the game, as quoted by the Mirror.
"I didn’t know if they were doing zonal marking or man-marking for Lovren’s goal," he said.
"That is how poor the defending was. Chelsea were not ready from the start (of the free-kick). There were four players not doing anything."
Take a look for yourself:
"I can’t believe at this level of football there has been that level of defending," he added.
"Gary Cahill was so obsessed with Joel Matip, and what a ball that is from Coutinho and what a finish from Lovren.”
Chelsea lacked organisation
Of course, Carragher can't have been that upset, as it was this kind of ineptitude from Chelsea that helped his former club come away with the three points.
Like many fans watching at home, though, he had a right to be a little perplexed. With David Luiz making his second debut for the Blues, it was to be expected that there would be some crazy defending, but Conte's men missed John Terry more than they realised.
Even if Terry's not the player he once was and has slowed down considerably, Chelsea lacked organisation and could have down with the skipper's leadership.
All the same, it gave Carragher plenty of ammunition to go in on Chelsea all guns blazing, so that can only be a good thing.
Did Chelsea deserve more from the Liverpool game? Have your say in the comments.