This Sunday's Derby d'Italia between Inter Milan and Juventus is one of the most important for years.
With Antonio Conte's Inter furiously chasing their city rivals and current Serie A leaders AC Milan, there is no margin for error against the reigning champions.
Meanwhile, after four consecutive victories in league and cup - notably their 3-1 win over Milan at the San Siro earlier this month - Andrea Pirlo's Juventus have their strength restored.
Ahead of the big clash, Sportsmail's ALVISE CAGNAZZO looks at where the contest will be won and lost.
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Antonio Conte (left) and Andrea Pirlo (right) will go head-to-head as managers when Inter Milan play Juventus in a mouth-watering Derby d'Italia this Sunday night
Inter Milan enter the weekend trailing their city rivals and Serie A leaders Milan by three points
Juventus have rediscovered their form with three consecutive wins in league and cup
PIRLO THE CHAMELEON vs SERGEANT CONTE
Conte against Pirlo is a meeting of two different philosophies with destiny confronting two Juventus legends from two different era.
Inter and Juventus have the opportunity to boost their Scudetto chances and the challenge will be a tactical crossword puzzle to claim three precious points in the Serie A title race.
Last season, Juventus beat Inter in both league meetings, always driven by Paulo Dybala's goals. They won 2-1 at the San Siro and then 2-0 at the Allianz Stadium played behind closed doors. So six points for the Bianconeri and zero for Conte's Inter.Insurance Loans Mortgage Attorney Credit Lawyer
Paulo Dybala was the scourge of Inter Milan last season, scoring both home and away
But it's clear Conte and Pirlo are two very different coaches who have different tactical philosophies: Conte is a fundamentalist coach, obsessed with victory and hard training sessions, a fanatic of 3-5-2 who does not allow tactical exceptions.
Pirlo is a sly poet who talks a lot with his players at the 'Continassa' sports centre without creating barriers and distance.
Pirlo is only at the beginning of his coaching experience and has chosen a more 'European' football than Conte who has developed ancient ideas with some new features from the third Millennium.
Conte has been accused of being too obsessed with his 3-5-2 system and lack of plan B
We're shaping up into an exciting title race in Italy as Inter, Roma and Juventus chase Milan
CONTE THE 3-5-2 OBSESSIVE
Conte built his sporting career on 3-5-2, a tactical scheme he has never given up on.
With him, Juventus players Dejan Kulusevski or Federico Chiesa would have been useless because they are not functional to the 3-5-2 and its emphasis on the wings.
The former Chelsea manager dismissed Christian Eriksen as incompatible with the club's tactical philosophy by trying to convert him to the role of attacking midfielder as deputy to Marcelo Brozovic.
Conte is a rigid and impulsive sergeant who creates distances with his players but knows how to understand their great commitment in training.
Things haven't worked out for Christian Eriksen (left) under Conte's regime at the San Siro
INTER MILAN vs JUVENTUS
Sunday, 7.45pm kick-off UK time
Live on Premier Sports 1
He is a coach very similar to Jose Mourinho for charisma and aggression and, for this reason, he has often had violent confrontations with pundits in the Italian media.
Conte's flaw is to concentrate all Inter's efforts on Romelu Lukaku at the centre of the attack.
The Belgian giant is the main reference point in Conte's plans and the manager is often accused of lacking alternatives to this basic scheme making use of Lukaku's muscle.
Conte's idea of football, despite Inter having the best attack in the league, places maximum attention on the importance of the defensive phase.