Defensive frailty has, of late, not proved costly, but there is potential it might in near future versus Tottenham Hotspur, Chelsea & Manchester City.
Former Liverpool defender and England international Jamie Carragher has scrutinised the club's rigidity at the back, explaining that Brendan Rodgers' rearguard must tighten up or face the possibility that they will continue to leak goals.
While thus far these concessions have not come at a cost - they have, after all, won every single one of their last seven in the Premier League - with examinations coming up against Tottenham Hotspur, Chelsea and Manchester City any defensive frailty could be exposed.
"Daniel Agger and Martin Skrtel have got to deal with the ball at the near post," Carragher stated on his Sky Sports column regarding the ease in which Ki Sung-Yueng was able to head in on goal late in Liverpool's eventual 2-1 victory over Sunderland on Wednesday evening. "They are two strong centre-backs and can't let a ball come through there."
The Englishman continued: "Jon Flanagan loses his man - he switches off for a second at the back post and Ki, who was excellent when he came on scored a deserved goal - but the ball should have been dealt with."
Sunderland's ability to exploit the team's defensive weakness led to on-pitch anger from Liverpool captain Steven Gerrard, who "berated" an accomplished first-teamer: "Gerrard was berating Skrtel after the [John] O'Shea chance because he had to deal with it; you've had the first goal but he just lets O'Shea walk in there. How costly could that have been?
"Again Liverpool have conceded a goal, but they've won. But the one nagging doubt people have about why Liverpool may not do it is because of situations like that. They've just got to be more aggressive in that box; they've got two powerful, international centre-backs.
"They've got to deal with it a little bit more."
If they continue to not, then it could start to cost them…