Dale Johnson, BBC Sport football issues correspondent

The curiosity about this incident is that the goal was initially disallowed for the wrong reason. Haaland was flagged offside when he shouldn’t have been.

But as it turned out, the goal should have been ruled out because Fernandez was offside.

There is one key part of the offside law which applies to Fernandez here. A player is offside if they are:

“Clearly attempting to play a ball which is close when this action impacts on an opponent.”

Both parts of that clause must be met. It is possible for a player in an offside position to attempt to play a ball and not commit an offence – there must be impact on an opponent too.

As the ball came in, Fernandez threw himself to try to head it, with Martinez directly behind him.

Video assistant referee Matt Donohue should ask himself if Fernandez’s action would have influenced Martinez.

In other words: If Fernandez had not jumped for the attempted header, would Martinez have made a different decision over playing the ball?

If the ball had been out of reach for Fernandez, or for Martinez, then there is an argument to give the goal.

And also: There would have been no offside had Fernandez made no attempt to play the ball.

But he did. And as it went just a yard in front of Martinez too, it is very difficult to argue Fernandez did not commit an offside offence.

There is also an argument that the actions of Fernandez influence the positioning of goalkeeper Senne Lammens.

However, the goal was originally ruled out for offside against Haaland – which was incorrect. So that decision had to be overturned.

And then, the VAR should have sent referee Michael Oliver to the monitor for the subjective offence by Fernandez.

It would have created the odd situation where a disallowed goal was reviewed to remain ruled out – but this is what should have happened.

It was a clear offside offence by Fernandez and will go down as a VAR mistake.

Was the VAR too concerned with a possible touch by Fernandez?

If so, did the VAR forget that Fernandez was offside, and not consider the subjective offence? It seems to be the most logical explanation.

A similar thing happened in a game between Arsenal and Brentford in February 2023 when a goal by an offside Christian Norgaard was not disallowed.