How Liverpool supporters judge the draw against Nottingham Forest depends very much on how they view their glass. For the half-full brigade, it was a good point earned in difficult circumstances at the form team in the league who have become fellow title contenders.

Those who see it as being half-empty, though, will bemoan an insipid opening hour to the game and a failure in the final quarter to turn complete attacking domination into goals, leading to another failure to win.

Certainly, the latter were the more vociferous in the immediate aftermath to the final whistle at the City Ground, a venue where Liverpool historically rarely fare well.

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And among those to whom fingers were pointed is Alisson Becker. The Liverpool goalkeeper had precious little do during the match with Forest managing just three efforts on target, two of which tamely made a way through to the Brazilian.

But that Alisson conceded with Forest's first effort prompted those to ponder a wider trend since his return to injury last month. In the six Premier League games he has subsequently played, he has faced 16 shots at goal and conceded nine goals.

While that ratio has prompted alarm among some, it's worth looking at the goals in isolation. On his top-flight return against Fulham in December, one effort deflected in off Andy Robertson while another came from an audacious flicked finish. The strikes against Tottenham came from either Liverpool mistakes or unmarked players inside the area, while Leicester's goal took a touch off a Reds defender at close range.

Alisson had no chance keeping out Lisandro Martinez's thumping effort against Manchester United while Amad Diallo's swift finish made it difficult for him to get down in time. And, similarly, Chris Wood's well-struck cross-shot for Forest's opener on Tuesday would have been difficult for any keeper to repel.

But there's no escaping the fact that in the previous seven Premier League games with Caoimhin Kelleher as the number one, Liverpool conceded nine goals from 25 shots on target in games that included Arsenal, Chelsea, Manchester City and Newcastle United.

So, what's happening?

Much like any outfield player working his way back to fitness, Alisson is still finding his groove. He would not be human if the fear of a recurrence of the hamstring problems that have blighted his previous 12 months was at the back of his mind, at least for now.

Indeed, his man-of-the-match display on his return to action in the Champions League at Girona would suggest he has lost none of his raw goalkeeping prowess.

It hasn't helped that Liverpool's overall defensive cohesion has been compromised in recent weeks, first with the injury to Ibrahima Konate, then Joe Gomez and more recently the form of both regular full-backs and the defensive midfielders.

Konate is another to still be working towards not only full sharpness but total confidence in his fitness, a concern he readily admitted earlier this week. Jarell Quansah appears to be suffering a little from second-season syndrome - not unusual in youngsters, particularly in defence - although Wataru Endo has offered a decent option at centre-back.

One clean sheet in seven league games, while not terminal to title hopes by any means, does highlight an area for improvement, particularly given Liverpool had secured seven shut-outs in their first 13 top-flight games of the campaign.

But with only Arsenal having conceded fewer goals after 20 games - 18 to Liverpool's 20, although their attack ranked behind the Reds, Tottenham, Chelsea and Brentford - again the bigger picture must be assessed.

And the occasionally-useful expected goals metric shows that, in terms of quality of chances coughed up, Liverpool have averaged 0.73 in their last six league games while conceding nine with Alisson back in goal, almost identical to the 0.74 average from when he started the first seven games during which Liverpool leaked just twice. It way well just be a case of opposing players being better - or more fortunate - with their finishing.

For Kelleher's seven starts, the xG was on average 1.19 per game although, as pointed out earlier, the opposition was arguably at its toughest during his spell in goal.

Even before the season started, with the agreement to bring Giorgi Mamardashvili to the club next summer, the goalkeeper situation at Liverpool has intrigued. But matters between the sticks are not a threat to their ongoing Premier League title challenge.