The Norwegian forward has been the talisman for City's attack since joining the club in 2022, scoring a whopping 175 goals in 209 appearances in all competitions.
Haaland has already scored 13 goals in 12 matches this season, including four goals in the UEFA Champions League but failed to score in the recent 1-0 defeat to Brighton and Hove Albion in the league.
"It's very important that in each game we create chances," said Maresca at the pre-match press conference.
"For sure when you have Erling inside the pitch it's better because you know he is going to score goals or be close. At the same time, we cannot rely on Erling for every game. We need the rest to score goals.
"But at the moment, the last game against Brighton was the only one where we didn't score, I think so. For sure if Erling is in the pitch, we are happy and for sure we need the rest to score goals."
The Cityzens currently occupy 12th spot on the League Phase table of Europe's premium club competition, with two wins and a draw in their previous matches in this campaign.
"We are in all the competitions," added the Italian mentor.
"We have many games and at the same time we have 20 senior players, all of them very good so it's good to have competition between them.
“We have so many games and so many good players. It's not a short run. It's not a sprint, it's a marathon."
Michael Carrick was delighted to see Manchester United claim a much-needed victory over AS Roma, but the head coach remains conscious of the considerable challenge of rescuing their season.
Real Madrid manager Jose Mourinho has warned his charges to expect a tough game when they face AEK Athens in the UEFA Champions League in Greece on Wednesday.
Barcelona bounced back from UEFA Champions League defeat when they comfortably dismissed Aston Villa 3-0 at Camp Nou on Tuesday night.
Bayern Munich captain Manuel Neuer expressed delight with their dominant UEFA Champions League display in the 2-0 victory over Atletico Madrid on Tuesday.
