Stevan Jovetic, the forgotten forward of last season's title-winning campaign after being dogged by injury, scored twice in the 3-1 victory over Liverpool.
Substitute Sergio Aguero, still making his way back to full fitness after his World Cup exertions after injury problems of his own late last season, added the third before Pablo Zabaleta's late own goal.
Pellegrini currently has to choose two from three - Edin Dzeko is his other fit striker with Alvaro Negredo still out injured with a broken metatarsal - but the Chilean believes he needs everyone at his disposal.
"We need four strikers. At this moment Stevan is doing very well but you cannot forget Negredo is injured," he said.
"Edin Dzeko and Jovetic and Aguero are working well. It is important that they continue playing the way they did.
"Kun Aguero is a very special player for us and it was good that the first ball he touched was a goal. That was not luck.
"He is working very hard during the week and this is an important reward."
With Jovetic hitting some form Pellegrini was asked who was the ideal foil for the Montenegrin.
"That is difficult to answer this at the moment but a player like Jovetic can play with any top player," he added.
"He was very unlucky last season but we never had any doubt about this quality.
"To start the season in this way after an unlucky new season is good but I don't think it is like a new signing."
One of City's summer signings, defender Eliaquim Mangala, is still waiting to make his debut following his move from Porto but Pellegrini does not think it will be long before he is up to speed.
"We will see during the next week," he added.
"It is not just him. Pablo (Zabaleta) needed some minutes.
"A lot of other players arrived late (after the World Cup) and we will see how we can do it so they can be 100 per cent fit.
"We will maybe see after the international break. We have to play seven games in 20 days after the international break.
"It is important we take advantage of every day. That is why it has been so difficult pre-season and at the start of the season."
- Sports & Recreation
- Sergio Aguero
- Pablo Zabaleta
- Stevan Jovetic
- Edin Dzeko
- Alvaro Negredo