MUNICH, GERMANY - AUGUST 02:  The team of Liverpool looks dejected after the Audi Cup 2017 match between Liverpool FC and Atletico Madrid at Allianz Arena on August 2, 2017 in Munich, Germany.  (Photo by Martin Rose/Bongarts/Getty Images)

FanView: 4 Key Lessons Liverpool Still Haven't Learned From Last Season

Following what was a pretty entertaining opening game of the season for Liverpool from the perspective of the neutral spectator, with the Reds drawing 3-3 away to Watford, fans of Jurgen Klopp's men have been left feeling quite rightly upset at the way in which Hornets were allowed to claw their way back into the game and earn a point. 

It's clear that even after their mixed fortunes of the previous seasons, some lessons are left to be learned, if Liverpool are to turn themselves into title contenders. 

With that said, here are four problems Liverpool desperately need to address.

4. Zonal Marking Has its Flaws

For years set pieces have been the bane of Liverpool's Premier League existence. Since 2014/15 they have conceded 44 goals from dead balls, that's 31% of all their goals conceded in the last three years. 

A clear, glaring, infuriating issue, and yet their system for defending set pieces remains unchanged. 

Liverpool implement a zonal marking system and it simply hasn't been working for them. Marking fresh air without tracking the run of attackers is a sure fire formula for conceding goals, and the Reds continue to leak goals and let points slip through their fingers without thinking to change their tactics.

3. Liverpool Aren't Capable of Sitting Back

The defensive frailties of Liverpool are far from a secret. In fact, since the departure of Rafael Benitez in 2010 it has been their weakest position, year after year. 

So why, when only one goal separates the Reds from the team they a facing, do they insist on sitting deep in an attempt to defend their lead?

Liverpool are a notoriously top heavy team and are at their best when on the front foot, so surely they should continue to implement the style of play that earned them the lead in the first place. 

2. Simon Mignolet Isn't a Consistent First Choice

Liverpool's issues with goalkeepers all seemed to begin with Brendan Rodgers choosing to replace Pepe Reina in 2013/14. The Northern Irishman brought in Simon Mignolet from Sunderland and the Belgian shot stopper has been infuriatingly inconsistent ever since.

On his day Mignolet's shot stopping and agility has him among some of the best goalkeeping talent in the league. Other days, however, Mignolet can be a rage-inducing player for Reds' fans. 

The Watford game was one of those days for Liverpool's number 22, failing to deal with routine saves, opting for punches instead of catches and overall failing to command his area. It is quite telling that all three goals conceded on Saturday came inside Liverpool's six-yard-box.

1. Attack Does Not Compensate for a Weak Defence

Liverpool's attack is unquestionably their best attribute. The pace of Sadio Mane and Mohamed Salah perfectly compliment the intelligence of Roberto Firmino and the passing ability of the midfield. 

Put all of that together and you have a team that is capable of scoring against anyone. They did of course net three times away from home against the Hornets.

You then know that defensively you have a massive problem on your hands when you can score three times and still fail to win. The Liverpool back four has been a weak point for years now and with mere days left in the transfer window, it is in dire need of improvement.