The Reds became the first team this season to defeat Pep Guardiola’s side this season after coming out 4-3 victors in their entertaining contest at the weekend.
Both teams were widely praised for their approach to the game with Jurgen Klopp and Guardiola opting to stick to their attacking principles.
In contrast, Jose Mourinho has been widely criticised for going with a defensive style of play when facing Manchester United’s top four rivals.
The Portuguese coach led his side to a 0-0 draw against Liverpool in October, despite going into the game as favourites due to the Reds’ poor form leading up to the match.
Equally Sam Allardyce’s appointment at Everton has been seen by some as a step backwards for the Toffees as the former England boss has often been criticised for playing less-than attractive football.
And Aldridge hopes his former side’s approach to the game against City on Sunday will prove the catalyst for other teams in the Premier League.
“Liverpool confirmed last Sunday that Manchester City are beatable if you have a go at them – and I hope more teams take a hint from this point forward and remove the fear factor,” Aldridge said in the Irish Independent.
“Of course, not many Premier League teams have an attacking set-up to match Liverpool’s, but compare the way Jurgen Klopp approached the game on Sunday to Jose Mourinho’s flat back ten plan when his Manchester United team played City.
“That was an embarrassing performance from a club of United’s stature and I can understand why their fans were ashamed of what they saw, with Liverpool’s display against the same opponents showing what is possible with a little ambition.
“City are a great team and deserve to win the Premier League this season, but we saw a game that was a great advert for English football and I hope it sets the tone for the rest of this season.
“Football should be about trying to win rather than avoiding defeat, but managers like Mourinho and Everton boss Sam Allardyce are ruining this game with their negative tactics and we should celebrate exciting games like the one we all enjoyed on Sunday.”