Jurgen Klopp arrived in England as a coach that was renowned for his offensive, energetic, thrilling football, and he's certainly lived up to that label during his time at Liverpool.
The Reds are now feared by the large majority of opponents, largely due to the attacking potential of Mohamed Salah, Roberto Firmino and Sadio Mane.
Despite Liverpool's revered attack, though, it's perhaps gone under the radar this season that the team's title charge has been founded on their defence.
Klopp's Reds have conceded the fewest goals in the league at this current stage with just 20, which is two less than Man City, even with the general lack of competitiveness that seems to be present in the large majority of their fixtures.
Arguably, the likes of Virgil van Dijk, Trent Alexander-Arnold and Andy Robertson should receive more praise, considering their sizeable contribution to the team's current state.
However, perhaps the most underappreciated player rooted in Liverpool's defence this season is Alisson Becker.
Mohamed Salah's best 11 goals for Liverpool - vote for your favourite
The Brazilian signed in the summer for what was a world-record fee for a goalkeeper, with the club investing a whopping figure in the region of £65m in his talent. Since his signing, that figure has hardly been mentioned, and that's testament to his performances.
To play for an elite, dominant side as a goalkeeper is difficult, as it often involves going untested for long periods. This stems from a team's behaviour on the field, as clubs such as Liverpool demonstrate an assertive and authoritative nature that affords little opportunities for opposing sides.
In the Premier League this season for example, Liverpool allow just seven shots on their goal per 90 minutes, which is bettered by only City. Some goalkeepers are able to cope with that level of non-participation better than others, and that's certainly the case regarding Alisson.
To elaborate, Expected Goals (xG) will be used in order to capture underlying performance. xG attains a value to every shot that is taken during a match based on the likelihood of those shots hitting the back of the net, considering aspects such as closeness to goal and shot difficulty.
The three teams that post the lowest Expected Goals Against (xGA) totals this season are City, Liverpool and Chelsea. This suggests that these teams have their goalkeepers involved less than Manchester United for example, as Ole Gunnar Solskjaer's team are eighth in the table for xGA.
However, although Ederson, Alisson and Kepa Arrizabalaga all operate with a degree of isolation, Liverpool's man appears to cope a lot better.
According to xG, Alisson should have conceded 27 league goals by now, but he only actually conceded 20 in reality. This means that the Brazilian is overperforming, as he simply should have allowed more goals in than he has.
In the case of Ederson, he should have conceded 35.5 by this point according to xG, and he's actually conceded 35. This essentially means that he's performing as expected, which suggests his shot-shopping is not good, not bad, but absolutely average.
And regarding Kepa, his output appears worse, as the Chelsea man should have conceded 34.1 in keeping with xG, but he's actually shipped 36.
In this case, the Spaniard is underperforming, as he's allowed more goals to be scored than expected, suggesting he's performing below average in terms of stopping shots.
Interestingly, Kepa was the player to snatch Alisson's label as the world's most expensive goalkeeper, as he was signed by the London club for an incredible fee of over £70m weeks later.
Based on showings this season, though, Liverpool appear to have landed the better deal, and this was evidenced on Sunday.
The Spaniard allowed Liverpool to take a two-goal lead in the second half by failing to influence the scoring situations that had materialised for Klopp's men.
For the opening goal for example, he manages to get his fingertips on Mane's headed shot, but fails to alter the trajectory of the ball, shown below.
It's a harsh criticism, but this may stem from his height, as the 24-year-old is 6ft 1in tall, compared to Alisson for example who's 6ft 3in. That factor may Mohamed Salah's best 11 goals for Liverpool - vote for your favourite, as despite the incredible quality of the shot, it's arguable that Kepa should do better, pictured below.
This is perhaps further emphasised when considering the fact that Alisson is yet to be beaten from outside the box in the Premier League this season, with Liverpool being the only team to boast such a trait.
Also, when considering the shots that he was faced with on the day, the outcomes were different in comparison to Kepa.
The Reds' No.13 was presented with two Eden Hazard chances inside the box, and he saved one, as well as providing enough distraction in the other for the Belgian attacker to hit the post.
Notably, he also faced Hazard in a crucial moment of the meeting earlier in the season, as the shot pictured below occurred with Chelsea already 1-0 up.
It's reasonable to suggest that if that was scored, Liverpool would have left as losers, but Alisson saved the shot, and the Reds managed to secure a point with a late Daniel Sturridge equaliser to make it 1-1.
There was also the 91st minute moment against Napoli in the Champions League, and the 90th minute stretching save when 2-1 up away to Burnley, pictured below.
Then, there's also the 20th minute close-range stop against Everton at Anfield, pictured below, which ended 1-0 when Divock Origi pounced on a mistake from Jordan Pickford.
These are just a few of the number of vital saves in crucial moments that Alisson has made in his debut season.
Ultimately, Liverpool now have a key difference-maker between the sticks, who's able to remain relatively uninvolved, but step up in pivotal moments.
This season, Liverpool as a team have been one of the best that England has seen in recent times - but it's daunting to consider where Klopp's team would be without the contributions of their world-class goalkeeper.
