Since Borna Barisic sustained a serious calf injury in early October, there has been instability at left-back.
With Lee Wallace ostracised, Jon Flanagan, was initially asked to fill the void.
A natural right-back, the scouser is clearly uncomfortable on the left side. His defending is generally steady. Yet, he is uncomfortable in possession, and rarely supports attacks with overlapping runs.
After a string of disappointing showings from Flanagan, Andy Halliday got his chance.
While Gerrard continues to afford his former Liverpool teammate opportunities, there is a big gulf between the two options.
Halliday may not be a natural defender, but he brings something very important to the table.
A quality left foot.
He showed that in Dundee last weekend, by firing an unstoppable free-kick into the top left corner.
Yet, it isn’t just one moment of brilliance that suggests he is the better pick. When Flanagan receives a pass, it either goes backwards or sideways. Any attempt at something more progressive, usually leads to a loss of possession.
On the other hand, Halliday has vision and the quality to make key passes. For a team looking to play attractive football, he is much better at linking the play and supporting attacks.
The stalwart’s excellent left peg ensures he is clearly a much better option than Flanagan. Should Barisic pick up another injury later in the season, Halliday should be the one to deputise.