When Jose Mourinho first arrived in the Premier League in 2004, he created a seismic shift in philosophy that would go on to dictate the nature of English football for the best part of the next decade.

The season before, Arsenal's Invincibles had claimed the English title undefeated, playing arguably the most aesthetic attacking football the Premier League has ever witnessed. From a defence consisting of Sol Campbell, two former midfielders, Kolo Toure and Lauren, and a left-footed winger-forward from the Gunners academy, Ashley Cole, to a strike partnership of Dennis Bergkamp and Thierry Henry, the north Londoners were blessed with goals and attacking flair in every department. Le Professeur's purist masterpiece had manifested into unbeatable brilliance.

But 'The Special One' soon put a stop to that. In fact, the brand of football Chelsea adopted under Mourinho actively defied everything the Invincibles stood for.

The notion of that Blues side being negative anti-footballers is a complete fallacy; they claimed more wins and more points than the Invincibles during Mourinho's first season, scoring only one less goal, so it's not as if they were parking the infamous blue bus every week.

Yet, Mourinho and Wenger's fundamental beliefs were completely polarised; the latter, an eternal beacon of free-flowing, progressive play, the former, a symbol of functional, balanced and physical football. It's an intrinsic difference perhaps epitomised best by Chelsea's utilisation of the 4-3-3 formation - and the resulting invention of the 'Makelele role' at the base of midfield.

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As the rest of the Premier League, including Arsenal, saw their 4-4-2 sides abruptly demolished, Mourinho's methods were adopted by the rest of the division. Sturdy, disciplined and direct football with an extra man in midfield. Suddenly, everybody had a poor imitation of Didier Drogba and Claude Makelele in their 4-3-3 orientated starting Xis. Suddenly, defensive solidity, before anything else, was the vogue priority.

So fast forward to the present day, and one feels obliged to ponder what effect Chelsea's latest crowning might have on the rest of the Premier League. There are certainly some interesting parallels. Just as Mourinho's first revolution followed the attack-minded Invincibles, Chelsea's title follows a 2013/14 campaign in which two sides, Manchester City and Liverpool, scored over 100 goals for the first time in Premier League history. In contrast, the Blues netted just 70 goals en route to this term's title, whilst conceding under one per match.

Consequentially, the nature of conversation has decisively changed in the Premier League over the course of the campaign. Rather than unleashing a string of superlatives to describe City, Liverpool or Arsenal's emphatic attacking play, we're now questioning their capacities at the other end of the pitch, whilst praising Chelsea's impenetrable backline. This time last year, whilst the Blues lingered in third, those conversations just weren't worth having - despite the fact they ended the season with four less goals conceded than this season. Most pundits were busy discussing false full-backs, ball-playing centre-halves and  No.10s.

But there are some important differences. Rather than setting his own trend, Mourinho has adopted the 4-2-3-1 system used fairly unanimously throughout the Premier League. In fact, one could argue he's now lending from the rest of the division, allowing his side to play more expansively with overlapping full-backs a diminutive playmaker in Cesc Fabregas who would've probably been deemed too lightweight to make Chelsea's engine room during the Portuguese's first spell at Stamford Bridge.

Over the next few years, however, I do believe Chelsea will be the team to emulate once again. Manchester City, for example, are almost certain to trade in Manuel Pellegrini for a manager who isn't hell-bent on playing 4-4-2 before next season, Arsenal are widely expected to finally sign a physically-imposing midfielder this summer and Southampton are emerging as one of the most formidable forces in the Premier League through their imperious back six, who boast a goals conceded record on par with Chelsea's.

Likewise, Sam Allardyce and Tony Pulis, two attritional enthusiasts firmly belonging to the Mourinho school of thought, have proved their effectiveness in the top flight yet again this year, whilst Everton and Liverpool - two of the Premier League's most progressive and eye-catching outfits last term - have faltered.

Of course, this isn't all down to Mourinho - although the manner in which he's claimed two titles immediately following attacking peaks in the Premier League is almost too regular to be considered a coincidence. But reigning champions are often the agenda-setters, purely due to the fact the rest of the division has to find a way of beating them. Clubs tend to either emulate them or attempt to juxtapose them completely - and the former is often seen as the less challenging scenario.

So although the shift might not be as drastic this time around in comparison to 2004, I believe we will see a return to the mantra of solid defence over free-flowing offence throughout the next few years.  Mourinho's revolution mark II is firmly underway.

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