Liverpool were officially crowned as the world's best team on Saturday as they beat Flamengo 1-0 to win the 2019 FIFA Club World Cup.

Roberto Firmino scored the only goal of the game in extra time and the Brazilian also bagged a stoppage-time winner in the 2-1 semi-final victory against Monterrey earlier in the week.

The Merseyside club have enjoyed steady yet remarkable progress since Jurgen Klopp replaced Brendan Rodgers to become manager back in October 2015.

In Alisson, reigning PFA Player of the Year Virgil van Dijk, Fabinho and Firmino, the team's spine is top-class, while Mohamed Salah and Sadio Mane are capable of magic in attack.

Liverpool are currently well-placed to win their first-ever Premier League title and, should they do so, there will be a period of time where they are champions of England, Europe and the world.

Klopp: A man of his word

In his first press conference as Reds boss, Klopp famously said: "When I sit here in four years, I think we'd have won (at least) one title (trophy) in this time. I'm pretty sure."

It may have took over three-and-a-half of those four years but the 52-year-old was proved right when Liverpool lifted the Champions League trophy in June.

Klopp's men beat Mauricio Pochettino's Tottenham Hotspur 2-0 in the final in Madrid and followed that up with a UEFA Super Cup triumph over Chelsea in August via a penalty shoot-out.

How Liverpool can rule England, Europe and the world

Liverpool's Club World Cup success in Qatar puts them in a strong position to pull off a unique achievement of ruling world, European and English football all at once.

To have any chance of doing this, Liverpool must win what would be their first league title in over 30 years - but they're in an excellent position to do that.

After missing out by a single point in the 2018-19 season, the Reds boast a ten-point lead over second-placed Leicester City in the 2019-20 campaign (having played a game less).

Liverpool have incredibly won 16 of their 17 Premier League games so far this term, with their only dropped points coming in a 1-1 draw with Manchester United at Old Trafford.

The final day of the Premier League season is scheduled to be May 17, while the 2020 Champions League final has been set for May 30.

So, that means if Liverpool win the league on the final day, they'll be kings of England, Europe and the world for at least 13 days (the best part of two weeks).

However, should Liverpool maintain their current ten-point advantage for the rest of the season, they'll be confirmed as champions on matchday 35 (April 25).

That would see Liverpool hold all three trophies for over a month and they can stretch that period to around seven months if they retain the Champions League (easier said than done).

Real Madrid are the only team to have successfully defended Europe's top prize in the Champions League era and Liverpool face a tricky Round of 16 clash with Atletico Madrid.

Regardless of all the permutations, if Liverpool win the league this season, they'll be champions of England, Europe and the world all at the same time at some stage in 2020.