In order to win three major trophies and have one hand on a Premier League title, the squad must be very well-oiled. This Liverpool side is arguably one of, if not the best fans have ever seen, and everyone has played their part.

The arrival of Alisson has helped solve goalkeeping woes that stretched back years. Mohamed Salah and Sadio Mané are two of the world's best attackers and haven't once took their feet off the gas this season. But what about the others?

There are many other key ingredients that have created this Red masterpiece, here's a list of just five who have proved themselves invaluable to the team, in more ways than one...

James Milner

Soccer Football - Premier League - Liverpool v West Ham United - Anfield, Liverpool, Britain - August 12, 2018   Liverpool's James Milner gestures during the match    Action Images via Reuters/Carl Recine    EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 75 images, no video emulation. No use in betting, games or single club/league/player publications.  Please contact your account representative

Mr Evergreen himself – arguably one of Liverpool's best free transfers in their history. James Milner arrived from Manchester City in 2015 and claimed the famous No.7 shirt. He might not have 82 goals to his name like Luis Suarez or have a stand named after him like King Kenny, but Milner's services to this club have been integral.

Despite being 34-years-old, Jurgen Klopp still sees the Englishman as a vital part to Liverpool's current system. Milner's versatility is very hard to come by, and it often goes under the radar just how much of a chameleon he can be. This season he has played primarily in a central midfield role but has also dropped into a more defensive position as well as playing at both left and right-back. Not to mention the entire 2016/17 season he spent covering as first choice left full-back without any trouble at all.

Milner's contract with the Reds runs out this summer and there have been talks of a return to boyhood club Leeds to see out his career. No moves have been made but the loss of such a highly-respected veteran will hit Liverpool hard.

Alex Oxlade-Chamberlain

Alex Oxlade-Chamberlain celebrates scoring for Liverpool

The addition of Alex Oxlade-Chamberlain in 2017 was one that stirred up a mixed bag of reactions. His time with Arsenal didn't paint the midfielder as someone who would arrive on Merseyside and set the game alight, but he definitely has.

Although the Ox isn't as prolific as some of Liverpool's past midfielders, he has established himself as a very important cog in this machine. In this campaign alone, Chamberlain has played in six different positions, including both the left and right-wings. His strength and creativity was sorely missed when he was ruled out with an ACL injury, and since his return, he's bagged seven goals this season.

Not only does he influence the engine room when he's on the pitch, but his personality is incredibly infectious. Chamberlain's light-hearted outlook has a positive impact on the rest of his teammates, which you can see in the number of videos he posts on his social media. The Reds have needed a big personality in the dressing room and the 26-year-old fits the bill nicely.

Trent Alexander-Arnold

It was fair to say there was some uncertainty surrounding Trent Alexander-Arnold when Klopp initially promoted him to takeover from Nathaniel Clyne. But since he was trusted with being one of the first names on the team sheet, he hasn't looked back.

Alexander-Arnold's piece of genius to set up Divock Origi against Barcelona last season will live on forever, but the young Scouser is much more than his quick corner-kick. At just 21-years-old, the England international has won the Champions League with his boyhood club and could soon lift the Premier League trophy too. Not to mention being nominated for the 2019 Ballon d'Or.

In a recent interview, Alexander-Arnold said: "Captaining Liverpool is something I have always dreamed of and it is something that motivates me. I have always been a Liverpool player, Liverpool has always been my home. I have never thought about changing clubs."

The Reds have been crying out for another passionate Liverpool-born leader, and they might just have their next one in Alexander-Arnold.

Jordan Henderson

Jordan Henderson celebrates scoring for Liverpool

The man who has dealt with so many negative comments over the years has shown the world why he was chosen to be Steven Gerrard's successor. He might not have the same 40-yard screamers in his locker, but Jordan Henderson's leadership abilities cannot be doubted.

The former Sunderland man has been with the club during their dark days and has helped drive them to become European royalty once more. His reaction to winning last season's Champions League showed the fans just how much it meant to win a trophy with this club – the club he has devoted everything to since he was 21.

As their first Premier League title looms in the distance, Liverpool fans must look back on the 29-year-old's journey and be thankful for the passionate, caring, no-nonsense captain they have in Henderson.

Virgil van Dijk

Virgil van Dijk in Liverpool training

Virgil van Dijk is undeniably a club icon, but not because of his record transfer from Southampton. Of course his price tag has paid off in his individual performances on the pitch but the Dutchman has brought so much more to Anfield.

Before the arrival of van Dijk, Liverpool were struggling massively with their back-line, leaking goals far too easily. Whilst he's helped plug a hole, he's also transformed Joe Gomez and Joel Matip. Both centre-backs have played toe-to-toe with their Dutch mentor whenever they've been partnered up, which has done wonders for the club's back four.

Van Dijk is also not just a fan favourite, but a favourite in the dressing room as well. His leadership abilities plus his calm and composed nature must create a real sense of admiration amongst him teammates. Just look at this video for proof...