Pep Guardiola's Manchester City side beat West Ham 4-0 in east London
New signing Gabriel Jesus started in front of Aguero for his first full debut in a City shirt and scored in the 4-0 win over West Ham.
The Brazilian, 19, joined City in the January transfer window after agreeing to move to the Etihad club six months ago.
Ageuro, City’s highest-paid player, earned a cameo appearance off the bench after City’s front three of Jesus, Leroy Sane and Kevin De Bruyne had wrapped the game up by half time.
“These three guys are the future for the club,” said Guardiola.
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“All of them their average age is around 20 years old.
“You can’t see the big clubs in Europe having strikers as young as that.
“It’s good for the club. We are delighted.”
Aguero, 28, is the veteran among City’s strike force, with Kelechi Iheanacho also just 20 years old.
And Guardiola insists Aguero remains his first choice on the team sheet, having decided to keep him out tonight after the Argentine missed last weekend’s win over Crystal Palace with a knock.
Manchester City were three up at half time against a sorry Hammers side
“(Aguero and Jesus) can play together, of course they can. Jesus can play in the left position,” Guardiola said.
“For us Sergio is so important to us. He knows and everyone knows we cannot achieve our goals without him contributions, which are so important.”
Asked if Aguero can expect to be on the bench in the future, Guardiola said: “No, it’s simple like that.”
As for Bilic, he was left to rue mistakes made that ultimately cost West Ham before they had a chance to test City’s resolve in east London.
City beat the Hammers 5-0 in the FA Cup last month and this was largely a repeat performance from both sides.
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A loose pass from Aaron Cresswell led to Kevin De Bruyne’s opener and goals from David Silva and Jesus had City in control at the break before Yaya Toure’s penalty wrapped up the result.
“It’s hard to find positive things from this game,” Bilic said.
“It was first of all well deserved to City, you have to give them credit. But we helped them.
“It was kind of a game like a few weeks ago in the FA Cup.
“It sounds crazy but we started well. We didn’t have many problems when we didn’t have the ball. But when we had the ball instead of playing it behind them, getting pace and using that space with a high line we tried to play square balls.
“And when we gave ball away in the areas in the first and third goal – sometimes you get away with it against teams of lesser quality but against them, with Silva and everyone, your team is split in two.
“These players like Jesus, Sane, they punish you. That’s exactly what’s happened. We tried to turn the game around but it was mission impossible for us.”
Aaron Cresswell had a night to forget at London Stadium
West Ham play Southampton on Saturday before a home clash with West Brom a week later.
They reacted to the FA Cup loss to City by thumping Crystal Palace 3-0.
And Bilic is confident the team will quickly return to winning ways.
“We bounce back. We bounced back after Arsenal, after the City defeat in the cup. We have to do it now.
“We can’t say this game doesn’t matter but we can’t let it affect our work rate and anything good we have done.”