Arsenal is confronted with Paris Saint-Germain in one of their most important games in recent history next week.
The Gunners welcome PSG in the Emirates Stadium for the first stage of the semi -final of the Champions League on Tuesday.
And if they win in two games, they will reach the final of Europe's Elite competition for the first time in 19 years.
It is certainly feasible, given the performance of the club against Real Madrid earlier this month.
But PSG will be a difficult test.
In the latest edition of Sunsport tactics, our expert Dean Scoggins looks into a look at how Arsenal can beat the Ligue 1 champions.
Will PSG play with a 4-3-3 formation?
Aston Villa showed in the second stage of the quarterfinals of the Champions League that you can get at PSG.
On paper they play 4-3-3 with three midfielders in a triangle including vitinha at the base.
However, that is rarely how a team ends up.
PSG and Luis Enrique are massive disciples of the 3-2-5, so the 4-3-3 will quickly convert into broad players who go up, a center ahead in the future, midfielders who participate and go a full back to shape a 3-2-5.
Become a member of Sun Club for the Arsenal files every Friday plus in in-depth coverage and exclusive of the Emirates
Manchester City and Arsenal both regularly do it in the Premier League.
The tactical flexibility of Achraf Hakimi in this situation is the key, because what can happen is that the person playing on the right – possibly Khvicha Kvaratskhelia, Desire Done or Ousmane Dembele – can enter.
Hakimi would then be the broad high man and the midfield player would stay inside.
They are very flexible, but it is a rigid structure.
PSG has an attacking form that they want to play inside.
They will run broad men at stake and try to keep their width all the way.
PSG are not afraid to be direct – they will switch a lot of the game and they will try to focus those wing players behind.
For Arsenal, the openings to attack will be high and wide.
PSG are very brave. They are more than happy to put the ball under pressure in an attempt to create more room for the attackers.
If Myles Lewis-Skelly plays for Arsenal as a left back, it is unlikely that he turns to the middle as he usually does, because the Parisians have a field day on the wing with the remaining space.
Mikel Arteta could go with Riccardo Calafiori or Jurrien Timber on the left with Ben White on the right because they are full-backs off and off.
Will rice be the midfielder?
Thomas Partey will not appear in the first stage for the Gunners due to a suspension of one competition.
It leaves Arteta with a few dilemmas – not just about staff.
The Arsenal boss could decide to play Mikel Merino next to Declan Rice in midfield.
Or rice can push besides Martin Odegaard, so that the dilemma of who the Houdman will be.
It can be white, wood or potential Calafiori.
But Arteta is risk -avoiding. It is very unlikely that he will simply change a player that he did not use in that position.
That is why Merino will probably stay in midfield with Leandro Trossard who goes in the NO9 position.
How does PSG fight that?
Enrique absolutely loves the diamond shape that he likes that 3-2-5 formation.
It means they can overload when they move forward.
They want to make an overload, so that opposition players are dragged in, leaving room for the attack.
Rice will therefore make the task of his life move over the field, so that the full-backs of Arsenal are not dragged in.
Does PSG have the most offensive threats?
PSG are breathtaking in the future.
They are so comfortable in every position. We could see one of Bradley Barcola, Kvaratskhelia, Doue and Dembele on the left – and then all in different positions.
And because they regularly switch during a game, this causes major problems for the defenders.
The changes of positions wide and in the middle will also be the key.
It is not only the attackers who are the big threats, it is also Hakimi.
That is why PSG is the most difficult team in Europe to defend itself at the moment.