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While Juve's midfield can be easy on the eye and a joy to watch as they initiate wave after wave of attack and mount pressure on the opposition—of which only Barcelona can rival—there is an ugly side to them that makes them so good.
While they do not have an outright spoiler or destroyer in the midfield, unlike, say, the stereotypical grafter like Milan's Nigel De Jong, there are certainly personnel who are capable of carrying out the essential dirty work.
Arturo Vidal is mainly this player, but it would be wrong to label this as his role in the side. As mentioned before, Vidal offers goals and can also be highly productive when linking midfield into attack.
However, it is certainly true that the Chilean offers one of the best engines in the sport, persistently tracking back and sweeping his teammates who are given license to roam forward.
Perhaps, in Vidal, Juve have the most complete midfielder of the lot, as the former Bayer Leverkusen star can do everything that the modern-day player is required to carry out.
Think Michael Essien in his prime. Vidal's competition for that label as the best all-around midfielder could be Yaya Toure or a Daniele De Rossi in his prime.
Regardless, Vidal is indispensable. His work rate and ability to perform a clean, well-timed tackle means that he is often the initiator to the counter-attack and the trigger for Juve to expose the opposition in transition—if they dare venture forward in numbers in the first place.