There is something wonderfully exciting about watching a teenager walk into senior football and look completely at home.

There is also something deeply uncomfortable about what happens when they don’t.

Ayden Heaven knows both sides of that equation. The former Arsenal academy defender has now found himself trying to establish his place at Manchester United, and his difficult start to the 2026/27 Premier League campaign should provide an important lesson for another Hale End graduate: Marli Salmon.

Heaven has made just one Premier League start this season, playing the full 90 minutes in United’s 2–0 defeat away to Hull City. It was a difficult afternoon for Michael Carrick’s side, with Heaven among the young players whose introduction into a struggling team exposed just how unforgiving senior football can be.

He returned to the starting XI for the League Cup and had a torrid night as his team threw away a 2-nil lead to lose 3-2 at home to Brighton.

Heaven is not a bad defender. Far from it.

Still only 19, his development is nowhere near finished, and one or two poor performances – in a team that is performing poorly – should not define him.

But that’s precisely why his situation matters to Arsenal.

Salmon is only 17 and has already been trusted with first-team football. He made his senior debut last season, featured in the Champions League and FA Cup, and has continued to be involved around Arsenal’s first team. He has also now made another senior appearance this season, impressing in central defence against Ipswich Town in the Carabao Cup.

The temptation with players like Salmon is obvious: when a teenager looks composed against senior opposition, the natural reaction is to want more. More minutes. More starts. More responsibility.

We saw this is the summer with many fans having Salmon down as our 4th choice centre back. “No need for Konsa, we have Salmon” many fans shared.

But centre-back is a particularly cruel position for a youngster to learn in.

A midfielder can misplace a pass and recover. A winger can lose possession and have another opportunity five minutes later. For a central defender, one mistimed movement, one lapse in concentration or one poor decision can immediately become a goalscoring opportunity.

Mikel Merino made exactly this point when discussing Salmon after Arsenal’s win over Ipswich. The Spain international highlighted the maturity required to play at centre-back and stressed how important it is to avoid mistakes because every action can be crucial.

That is the balance Arsenal have to get right.

And it is a balance we got right when developing another talented young defender – William Saliba.

For some fans, Saliba spent too long on loan in France. They shouted for him to return a season earlier. Instead Arsenal sent him to Marseille who acted as a finishing school.

Whilst on loan, Saliba made mistakes. But away from the Premier League spotlight, he was able to move on from them quickly. And at 21 he was ready to return to Arsenal. Ready for first team Premier League football. And ready to become the best central defender in the world.

Salmon is clearly a talent. His progression from joining the academy at nine to making his first-team debut before turning 17 is evidence enough of the faith the club has placed in him.

But Heaven’s experience is a reminder that potential doesn’t remove the learning curve.

Arsenal don’t need Salmon to be flawless. They need to give him an environment where mistakes can be absorbed rather than magnified.

Another season of being in and around the Arsenal first team should be followed up by a loan to a Championship team in 12 months. That will get Salmon used to regular, physical first team football. That first elbow from a 6 3 English journeyman striker will make Salmon a man.

Come 2028/29 Salmon will still only be 19. That is still incredible young as a centre back. But he will be more ready to be involved in Arsenal’s first team squad on a regular basis.

Both Konsa and Gabriel will be 31 by then. Saliba 27 and Cristhian Mosquera just 24. The pathway for Salmon will be clear.

The difference between promising a teenager and breaking a teenager can sometimes be nothing more than timing.

And if Arsenal can take anything from Heaven’s difficult moments at United, it should be this: don’t confuse early exposure with finished development.

Salmon doesn’t need to be rushed simply because he looks ready.

He needs to be allowed to become ready.

Because the most exciting thing about Arsenal’s next generation isn’t how quickly they can become stars. It’s how carefully the club can help them get there.

Keenos