The title race took another twist as Liverpool lost 2-1 to Manchester City on Thursday night.
Sergio Aguero gave the hosts the lead in the 40th minute after rifling past Alisson from a tight angle.
Liverpool battled back in the second half and restored parity through Roberto Firmino in the 64th minute.
But, Leroy Sane then gave Man City the lead eight minutes later, with his shot creeping in off the post.
Pep Guardiola's side held on to the lead and have now cut the gap between them and Liverpool to four points.
The result is not disastrous for Liverpool. However, they now know they only have a small advantage over City at the top of the table.
Jamie Carragher was working for Sky Sports during the game and made his feelings known after the game.
While praising Bernardo Silva and Fernandiho, Carragher also gave Jurgen Klopp some tactical advice.
He wrote on Twitter: "Enjoyed the game not the result! The intensity from Man City in midfield was excellent with Fernandinho & Bernardo Silva the two best players on the pitch.
"LFC need to get back to 4231, I can understand 433 tonight but it didn’t work & we need to move away from it. #cityliv"
That is an interesting take from Carragher.
Liverpool lined up with Georginio Wijnaldum, James Milner and Jordan Henderson on Thursday night.
While they are all decent players, that midfield three offers very little creativity going forward.
Man City were able to stifle their threat and ultimately took all three points.
There certainly is a case to move back to 4-2-3-1, but Liverpool fans had a mixed reaction to Carragher's tweet.
Some agreed, saying 4-2-3-1 is the formation Klopp should turn to for the remainder of the season.
Others thought that Liverpool can still play well in a 4-3-3 with the right personnel.
While others defended the 4-3-3 and think losing one game doesn't necessarily mean the formation does not work.
To be fair, Carragher could well have a point.
Their midfield did not work well against Man City and offers very little creativity.
Regardless, it is certainly something to think about for Klopp as he looks to guide Liverpool to their first ever Premier League title.
Do you think Liverpool should play with a 4-3-3 or a 4-2-3-1? Have your say by leaving a comment below.