"Because they have got that feeling of last season that at times, like the great Man United sides, the great Arsenal teams under Arsene Wenger, where you actually think 'how can you beat them?'".
Guardiola will be wary of being outnumbered down the flanks in that system, however, especially with Liverpool's full-backs in such fine form, and therefore the four-man defence feels more logical.
The game pits two of the game's most dynamic and inspirational managers against each in City's Pep Guardiola and Liverpool's Jurgen Klopp.
The on-loan Liverpool winger, who played the full game, helped his team on their way to three points with the opening goal three minutes into the encounter at Ibrox.
The best chances fell to Salah but the Egyptian showed again that he is lacking last season's sharpness, blasting well off target when found in space in the 69th minute.
The French World Cup victor had been in brilliant form for the Premier League champions prior to being sidelined by a foot injury for the past month.
Liverpool, meanwhile, have recalled Dejan Lovren to their starting XI in place of Joël Matip, while Joe Gomez will play at right-back ahead of Trent Alexander-Arnold.
Armed Forces ready to help out in quake and tsunami hit Palu
The State Disaster Agency warned people to stay at least 4km away, but said there was no need to evacuate for the time being. The French rescuers said on their Facebook page that 40 people, including six workers, were still missing there.
City quickly neutralized Liverpool's threat by keeping possession for long periods without forcing Alisson Becker into a save before the break.
But for one reason or another, Aguero is yet to score at the home of Liverpool in nine appearances for both Manchester City and Atletico Madrid.
Guardiola was furious as another penalty shout was turned down when Van Dijk was instead awarded a free-kick for a pull by Fernandinho as the Dutch defender handled inside the area.
Manchester City is always tough, even when we won 3-0 in the Champions League.
Pre-match talk that a positive result for City or Liverpool would make them favourites to win the title now looks premature, with Chelsea the big winners of the weekend having thumped Southampton earlier in the day.
But that proved costly as the pressure got to Mahrez and City had to settle for a point. Eden Hazard was once again the inspiration as the Blues, maintained their unbeaten run.
Alexandre Lacazette and Pierre-Emerick Aubameyang both scored twice, with Aaron Ramsey grabbing the other.