The Reds’ staple system for the majority of last season, Klopp moved away from the 4-3-3 and onto a new-look 4-2-3-1 towards the end of 2018, after its use in the 3-0 victory over Southampton in September.
There are merits for both systems, and Klopp can employ both as the rest of the campaign plays out, but there is certainly cause for debate over which is more effective.
Of the 20,900 fans to vote on Facebook, 78 percent backed a regular return to the 4-3-3 system, which was used for most of the 2017/18 campaign.
A popular line was that Klopp does not currently have the right personnel to field a 4-2-3-1, which is debatable given its efficiency earlier in the season.
“4-2-3-1 helps us defensively…but we don’t have a striker to bang in those goals. Salah is much more effective as a wing man than a striker,” Ansel Kevin argued.
“4-3-3 is ideal right now. Because it doesn’t just make Salah more influential, it also makes Bobby more useful than when he plays No. 10.
“Maybe if we sign a No. 10 and a No. 9 next season, we can try 4-2-3-1, but right now we don’t have the players for that.”
Jason Rowlands agreed, writing: “4-3-3 every time for me. Playing Firmino in the No. 10 role just doesn’t seem as effective as Firmino as a false nine.”
Interestingly, Shane Treacy offered a contrary stance, writing that “4-2-3-1 has got us in with a chance. We’ll start conceding again if we stick with 4-3-3.”
Treacy added that Klopp should “switch between the systems for different games,” which seems sensible, and was reinforced by Mohammed Suleman, who wrote that it “depends on who’s the opponent; different systems for different teams.”
The 4-3-3 was similarly popular with the 5,878 voting on Twitter, with 74 percent opting for the previous formation over one which brought big victories over Watford, Burnley, Bournemouth, United and Newcastle in 2018.
“We play better in a 4-3-3, with Firmino up top, he offers a lot more than as a false nine,” wrote @frosa720, echoing both Kevin and Rowlands.
“[The] 4-3-3 is more balanced and gives more control, though demands a lot from the midfielders,” explained @Rageera.
“The current midfield of Fabinho, Gini and Keita is about perfect for it as all of them have the engine, quick passing and technique required. But the midfield two in some matches works well also.”
Naturally, the pragmatic approach seems best, with DanielHit58 writing that it “depends on [the] players. With Shaqiri 4-2-3-1; without him 4-3-3.”
“When players have energy to press, it’s 4-3-3. Absolutely,” added @tomi_tikka. “With lower tempo 4-2-3-1 works better.”
If energy is the deciding factor with the 4-3-3, the hope will be that Liverpool return from Marbella revitalised and prepared for a big night against Bayern Munich on February 19.