sport news How 's biggest teams have started the new Serie A season in the most open ...

The Premier League is not the only season to have started brightly as the 2020-21 Serie A season looks to be as open as ever before. 

Juventus' quest to win 10 Scudetto titles in a row is hitting a snag as Andrea Pirlo struggles to sort out his best side, while AC Milan are showing signs of a solid revival after they stunned Inter Milan in the Derby della Madonnina over the weekend. 

's Inter have invested well but started poorly, while last season's surprise packages Lazio and Atalanta have showed promise but had mixed fortunes. 

Sportsmail takes a look at the state of play in following the opening four matches of the season... 

Juventus' quest to win 10 Scudetto titles in a row is hitting a snag as Andrea Pirlo (R) settles in

Juventus' quest to win 10 Scudetto titles in a row is hitting a snag as Andrea Pirlo (R) settles in

Inter Milan

is running out of excuses at Inter Milan. After being convinced by the Europa League runners-up to stay on as manager, his side was constructed just how he requested in the transfer market.

One of the biggest investments over the summer was full back Achraf Hakimi, who joined in a £35million deal from . However, the Moroccan is showing defensive lapses in a back line that has already shipped eight goals in four matches. 

The defence is becoming a clear weak spot for Conte's Inter, despite heavy investment in their back line during the window.  Their other defensive signing, Aleksandr Kolarov from Roma, is deemed as too attacking for the left centre back role and often gets caught out on the break.

Antonio Conte is running out of excuses after his Inter side lost the Milan derby on Saturday

is running out of excuses after his Inter side lost the Milan derby on Saturday

Achraf Hakimi was a big investment for Inter Milan over the summer but has unimpressed

Achraf Hakimi was a big investment for Inter Milan over the summer but has unimpressed

Both Hakimi and Kolarov were nowhere to be seen in the first half of their 2-1 defeat by AC Milan on Saturday, as Zlatan Ibrahimovic gave Inter's arch rivals a two-goal lead. 

This time last season, Conte side registered three clean sheets in their opening four matches last term, with the likes of Antonio Candreva and Ashley Young providing stability in the wing-back areas.  

Now the Italian coach needs to change his defensive structure if he wants to mount a Serie A title challenge.

Aleksandr Kolarov (left) is another new defensive addition who has struggled so far

Aleksandr Kolarov (left) is another new defensive addition who has struggled so far

There's also the problem of Christian Eriksen at Inter, who is slowly turning into a flop at the San Siro club. 

The Danish midfielder is a slow player with flair, with Conte preferring fast and physically strong middle men in his 3-5-2 set-up. 

The 28-year-old is getting game time at Inter, but every time Eriksen enters the pitch he suffers with the pace of Italian football. 

With a £9million-a-year salary, he is not justifying his hefty wage packet. 

Christian Eriksen (right) is also struggling to start matches under Conte this season

Christian Eriksen (right) is also struggling to start matches under Conte this season

Juventus

Under the young stewardship of Andrea Pirlo, Juventus are still a work in progress and the Old Lady are suffering from a true tactical identity. 

In his first three matches in charge, Pirlo has changed the Juventus formation three times, between a 3-5-2, 3-4-1-2 and a 3-4-3 set-up. 

The Juventus coach is asking for a quick and relentless style of progressive passing but his players are taking their time to get to grips with this.  

Andrea Pirlo has played different formations in first three matches in charge of Juventus

Andrea Pirlo has played different formations in first three matches in charge of Juventus 

Furthermore, Pirlo cannot decide who forms the best partnership in midfield which is leading to disjointed performances, such as the back-to-back draws against Roma and Crotone. 

New signing Weston McKennie started the first two games alongside Frenchman Adrien Rabiot, but their lack of presence in the defensive side of the roles was clear to see in the 2-2 draw against Roma last month - so much so that Rabiot was sent off for two yellow cards. 

Pirlo opted to play £75million Arthur and Rodrigo Bentancur against Crotone, but the new midfield pair didn't do much better as Juventus slipped up with a 1-1 draw against the newly-promoted side. 

Pirlo started then dropped midfielders Adrien Rabiot (middle) and Weston McKennie (right)

Pirlo started then dropped midfielders Adrien Rabiot (middle) and Weston McKennie (right)

The new Juventus coach must fix this obvious problem in midfield if he wants to guide his side to a 10th Serie A title in a row. 

Another issue for Pirlo to deal with is how to fit in Paulo Dybala, who has been an unused substitute for all three of Juventus' league games this season. 

Last season's Serie A MVP runs the risk of being exiled by the new Juventus head coach, just like Massimiliano Allegri did when he was in charge at the Turin club. 

Last year's Serie A MVP Paulo Dybala (left) has also failed to play a single minute under Pirlo

Last year's Serie A MVP Paulo Dybala (left) has also failed to play a single minute under Pirlo

Youngsters Dejan Kulusevski and even the raw Manolo Portanova have been preferred to Dybala since the start of the season, putting serious doubt as to whether the forward will sign a new five-year deal at Juventus. 

However, Cristiano Ronaldo's recent coronavirus diagnosis could allow the Argentinian attacker to return to the line-up, starting in the midweek Champions League clash with Dynamo Kiev. 

AC Milan

The Rossoneri are now one of only two teams, along with Aston Villa, in Europe's top five leagues who are yet to drop a point this season.

Milan currently lead the Serie A table and while talk of a title challenge seems a little premature, there is certainly a case to warrant discussion of a top-four challenge.  

To think that the club nearly replaced Stefano Pioli for Ralf Rangenick earlier this year, but some excellent form at the back end of last season led to Paolo Maldini sticking with his current option - and boy is it paying off.  

AC Milan, who beat Inter in the derby, now lead Serie A after four wins from four this season

AC Milan, who beat Inter in the derby, now lead Serie A after four wins from four this season

Milan nearly dismissed head coach Stefano Piolo (above) but rightly stuck with the manager

Milan nearly dismissed head coach Stefano Piolo (above) but rightly stuck with the manager

The former Fiorentina, Inter and Lazio manager proves to be the best man to handle Zlatan Ibrahimovic's interesting character. An over-reliance on the Swede used to be a problem at Milan - but

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