Mikel Arteta's Arsenal revolution has gained momentum over the past week with impressive wins against champions Liverpool and the Spaniard's former employers, Manchester City.

The Gunners travel to relegation-threatened Aston Villa on Tuesday night looking to maintain their fine form before they close out their Premier League campaign at home to Watford on Sunday.

It will be an important, albeit short, close season for Arteta, but the shoots of recovery are already visible.

Using Opta data, we analyse what he's got right in his seven months in charge and what he still has to do.

Making the Change to Three At The Back 

In each of his first 10 Premier League games, Arteta started with a 4-2-3-1 formation before first deviating from this after lockdown with a 4-3-2-1 against City.

Since then, he has consistently utilised a 3-4-3, starting with this formation in his most recent six league games in charge. In terms of minutes played in each formation, accounting for formation changes within games, Arteta has played 51 per cent of the time with a 4-2-3-1 and 30 per cent in his newly favoured 3-4-3. What is most interesting about this shift to three-at-the-back is the change in personnel between these set-ups.

You can see below who has featured the most in each position in Arteta’s two favoured formations since he took over:

Arsenal 4-2-3-1

Arsenal's 3-4-3 formation

Since his shift to the 3-4-3, Arteta appears to have found more consistency with his team selection with Granit Xhaka and Dani Ceballos nearly ever-present in the two central midfield positions and Pierre-Emerick Aubameyang continuing to excel from the left wing. Arteta has also been able to play Bukayo Saka further forward and deploy a high energy full-back pairing of Kieran Tierney and Hector Bellerín.

If it wasn’t for his injuries, Pablo Marí would have almost certainly featured more in Arteta’s new-look backline. The Spanish centre-back, who made his loan move from Flamengo permanent last month, meets Arteta’s demands for a left-footed centre back and would be a more natural option than Sead Kolasinac. Having a left-footed player in this position changes the passing options available in the build-up and is something he may have picked up from working with Pep Guardiola, who spoke earlier in the season about the importance of Aymeric Laporte’s left foot to the way City play.

While injuries and off-the-field issues have played a significant role, the notable omissions since the initially favoured 4-2-3-1 formation was abandoned are Mesut Ozil, Ainsley Maitland-Niles and Sokratis Papastathopoulos, with all three players struggling for minutes, fuelling speculation about their futures at the club. Meanwhile David Luiz, Xhaka and Aubameyang are clearly emerging as Arteta’s first names on the team sheet, with Shkodran Mustafi another surprisingly regular feature at the back.

Generating Goal Scoring Opportunities From Pressing 

Much has been said about Arteta’s attitude to pressing since he took over at Arsenal and the inevitable comparisons this brings to Guardiola's City. Whether it is the subtle instructions to his players to commit opposition players before making a pass in order to take them out of the game, or the more meticulous pressing patterns when Arsenal are out of possession, it is clear to see the influence the Catalan has had since he took over.

This is reflective in the efficiency of Arsenal’s pressing and their ability to turn these into goalscoring opportunities, as demonstrated against City at Wembley at the weekend. We can see below Arsenal’s high turnovers this season before and after Arteta took charge, where a high turnover is defined as a team winning possession in open play within 40 metres of the opposition goal.

Arsenal turnovers

While the quantity of high turnovers has remained constant, Arteta’s Arsenal have converted 22 per cent of these high turnovers into goalscoring opportunities, compared to 11 per cent before he joined.

In fact, since he took charge, no team has scored more goals from high turnovers than Arsenal (five) with two of these coming at the expense of Liverpool last week. Despite often favouring Eddie Nketiah as his high energy striker leading the press from the front, it is actually Alexandre Lacazette who has made the most high turnovers (11) under Arteta in the Premier League this season.

Arsenal high turnovers

Defensive Fragility Still Apparent 

While there is an understandable optimism among Arsenal fans about their performances under their head coach, there may be some cause for concern given their xG, at both ends of the pitch.

Arsenal's xG

We have measured Arsenal’s underlying performances by their expected goal difference, given the quality of chances taken for and against Arsenal (xG for Arsenal minus xG against).

Since Arteta’s first match in charge, you can see that Arsenal’s underlying performances haven’t actually improved despite their increase in actual goal difference. This over performance relative to their expected results isn’t likely to be sustainable.

If we break this down further, we can see that Arteta’s Arsenal have been both scoring above expectation and conceding below expectation. They have scored 29 non-penalty goals from quality of chances, according to xG, that you would expect a team to only score 21.5 goals.

Arsenal shot locations

More alarmingly, the major cause for concern is in the disparity between their attacking and defensive outputs.

Arsenal have taken 174 non-penalty shots since Arteta took over but have conceded 237. The average quality of these shots (xG per shot) has been similar but the key difference has been in the execution.

Arsenal’s opponents have scored 16 non-penalty goals against them, but the underlying chances suggest they should have scored over nine more (25.3 expected goals).

Arsenal opponents

While Arsenal are still in with a chance of finishing in the European places this season, it is a big worry where they might have actually finished if their recent results were reflective of their underlying performances.

While there is no doubt that their attitude and spirit has been transformed under Arteta, wins over Liverpool and City only paper over the cracks of the need for improvement in this Arsenal team.

Arteta has spoken very honestly in recent interviews about the need for future investment in the squad if they are going to seriously challenge for titles going forwards.

This story was originally published by Stats Perform. For more like this, sign up for The Analyst newsletter at statsperform.com/resources