ARSENAL took another huge step towards Premier League glory with a dramatic 1-0 win over West Ham on Sunday.

It was hardly smooth sailing for the Gunners, with having to make a series of tactical tweaks throughout.

English Premier League - West Ham vs ArsenalLeandro Trossard fired Arsenal to a 1-0 win against West Ham Credit: EPA West Ham United v Arsenal - Premier LeagueMikel Arteta made several tactical changes Credit: Getty

The first came when and the Spaniard opted to move from midfield to right-back.

And when that didn’t work, was introduced at half-time to replace , with moving from centre midfield to left-back.

Arteta also made a huge call in the second half – one that ultimately won Arsenal the game.

In the latest episode of SunSport’s Tactics Exposed, our tactics guru Dean Scoggins looked at how the Gunners took one step closer to the title.

Gaard of honour

has received a lot of criticism in recent weeks, but he made a huge impact after coming on at the London Stadium.

changed back to a back five and a 5-2-3 shape, meaning they had three pressing players when out of position.

‘s passing lanes were blocked as a result, making it difficult for them to play forward.

Screenshot from a soccer match showing players from two teams, West Ham and Arsenal, on a green field. A scoreboard in the top left corner shows the score as 0-0 and the time as 07:35. Numbers "2" and "3" with dashed lines connect players on the field.West Ham pressed with three players after setting up in a 5-2-3 Screenshot of a soccer game with the score 0-0 and 82:00 minutes elapsed. Players Ødegaard and Madueke are highlighted with arrows indicating passes.The introduction of Martin Odegaard led to the decisive goal Illustration of Martin Ødegaard's match stats, showing 23 minutes played, 1 chance created, 13 passes with 69% accuracy, 8 forward passes, 3 passes into the final third, 2 passes played into the box, 15 touches, 1 touch in the opp box, and 2 possessions won for the West Ham vs. Arsenal game.The midfielder changed the game

It also allowed the West Ham wing-backs to jump out of position without leaving too much space behind.

Arteta changed things up with Odegaard coming on for and replacing in the second half.

The Gunners immediately gathered momentum going forward, with playing in more of a No10 and Madueke stretching the pitch.

That gave Odegaard more space to attack – and that was evident in the goal.

Arteta kept rolling the dice and it paid off.

The man with the golden glove

Everything else happening in the box at that time is redundant while that is going on.

If the had been cleared, then VAR would have looked at the other incidents.

Because VAR has allowed similar incidents to happen all season, referees have stopped refereeing games in the penalty area.

They have let everything go. It should never have got to that point.

Illustration of Raya's match stats from a West Ham 0-1 Arsenal game.David Raya made some crucial saves David RayaRaya was awarded a foul after being impeded in the build-up to West Ham’s disallowed goal Credit: PA

Raya was brave to attempt to catch the ball at that corner – it was how he won the foul.

But he also made some crucial saves earlier in the match.

The first was at the end of the first half from a Taty Castellanos diving header.

But the best was from a one-on-one with from close range.

He timed the actual save to perfection, first starting small to then spread his body to stop the ball.

Gerrard, Lampard, Trossard

Big moments – has had a few of them now.

The winger found himself in pockets of space more in the second half, especially in the narrow areas.

That is what allowed him to be in the right position to get that decisive shot away for the goal.

Illustration of Trossard's heat map showing his activity on the field during the West Ham vs. Arsenal match where Arsenal won 1-0.Leandro Trossard had an impressive match

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