In the end, Jurgen Klopp did well to hide his undoubted frustration.

The Liverpool boss, as a lover of football first and foremost, will no doubt have been enthused by what he witnessed on his maiden visit to the Brentford Community Stadium on Saturday evening.

An end-to-end game played at a frenetic tempo; Klopp saw his football ideals on show as both teams went hell-for-leather for a fourth goal in the five minutes of stoppage time.

But while Saturday's 3-3 thriller was arguably the game of the Premier League season so far, they do little for the nervous system.

Especially when there are titles to be won and the margin for error is barely visible.

"They got a point, we got a point, it's fine," was Klopp's summary of the night's work. "Let's move on."

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Liverpool will move on, but there were no doubts some 'what ifs' left in west London when the team coach moved towards Merseyside on Saturday night.

After seeing both Manchester United and Chelsea lose earlier in the day, this was the perfect chance to open up an advantage at the Premier League's summit.

They did that, of course, but the three-point buffer would look a lot healthier than the single one that sees Liverpool lead the way at present.

The unbeaten run, at least, rolls on.

It now stands at 16, dating back to that miserable defeat to Fulham in March when a side who would ultimately be relegated inflicted a sixth successive home defeat on Klopp's then beleaguered Reds.

The current run is the longest in all four divisions of English football, but Liverpool will not have played as poorly during that six-month period as they did at Brentford on Saturday night.

Passes were slack, touches were loose and the collective calm that runs through this side when its big names are in position was conspicuous by its absence.

But here's the rub for Klopp's side; Liverpool's title rivals may be waiting a long time before they see them turn in a performance as error-strewn and as careless as this.

Liverpool's centre-back pairing of Virgil van Dijk and Joel Matip looked as they perhaps ought to right now as two players still looking for top speed after such a long time on the shelf.

The defenders have been virtually flawless so far this term, helping the Reds to shut out everyone bar Chelsea and their smart corner routine prior to Saturday, but the mobile and powerful attack of the Bees unsettled two players who have barely played in 2020.

Standards slipped in midfield too as Fabinho endured an evening that was out of sync with the performances that have seen him lauded as arguably the finest defensive shield in English football right now.

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Off-days will continue to crop up, naturally, and the inquests into Saturday's events should really be brief given how well Liverpool, generally, have performed so far this term across three competitions.

You suspect it will be a while until so many of Klopp's stellar cast are as below par in the same game again too.

Throw in the fact that their most underwhelming display for months still did not result in a defeat against the spirited Brentford outfit and it seems as though Liverpool have rediscovered their teak-tough mentality.

That may seem like a curious observation at a time when they have just conceded three to a newly-promoted side, but this battling point spoke to the reserves of character that are still filling the well for Klopp.

That will be needed by the bucketload as Liverpool get set for a huge week before the international break is upon us.

Porto are up next in the Champions League and three points in Portugal will go a long way towards a place in the last 16 of the tournament in the New Year after the Group B campaign kicked off with a bang against AC Milan earlier this month.

The Reds are more than familiar with Porto given their recent ascent back towards the top of the European mountain saw them climb over Sergio Conceicao's side twice in 2018 and '19.

There should be little to fear at Estadio do Dragao given their most recent trips have yielded an aggregate score of 9-1.

It's the fixture a little further down the road next week that is perhaps grabbing the attention of supporters most right now, however.

Liverpool welcome Manchester City to town for the first time since that desperate 4-1 loss to the champions in February.

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The winter grip had truly taken hold of Klopp's side at the time as City took full advantage of glaring errors and no crowd to secure their first win at Anfield since 2003.

"Hopefully, next time we can do it with a similar performance with spectators as Anfield with and without fans is completely different," Pep Guardiola conceded after the game.

That, then, is perhaps why Liverpool will feel emboldened next weekend.

The power of Anfield - a full Anfield - has often seen Guardiola's men go on bended knee and recent history indicates that City wilt when 54,000 are packed inside that famous old stadium.

City's defeat of Chelsea at Stamford Bridge was impressive, but they are unlikely to find Liverpool in the same timid and unambitious mood as Thomas Tuchel's men on Saturday lunchtime.

Like Brentford on Saturday, it promises to be another pristine advertisement for the Premier League brand.

Even if Klopp will be looking for wholesale improvements.