Juventus have always been the most hated opponents as far as Fiorentina fans are concerned. This is an old rivalry which got fiercer after Juve won the championship title at Viola's expense in controversial circumstances in 1982, and became unbearable following Roberto Baggio's sensational transfer from Florence to the Old Lady in 1990.
While the champions might not always treat Fiorentina as equals, they are the most important games by a distance for players and supporters in purple.
Now imagine you are a 18-year-old kid lucky enough to make your Serie A debut for Fiorentina against Juventus, of all teams. It is hard to describe Federico Chiesa's feelings in August 2016, when coach Paulo Sousa told him that he was going to be in the starting lineup at Juventus Stadium in place of the injured Borja Valero. He only played for 45 minutes out of position and was substituted at half time but made a positive impression. Those memories would stay with him forever.
Juventus won, but five months later Chiesa made sure the result was different in Florence. It took him time to convince Sousa, but by January the youngster became a starter and starred in the emphatic 2-1 win over the Old Lady.
He even scored his first Serie A goal of his career ... or did he? That is still open to question. As Milan Badelj played a clever through ball into the area, Chiesa outsmarted Alex Sandro to get to it first. He attempted to touch the ball, and still claims he made contact with it. According to the official statistics, the goal was awarded to Badelj, but what really mattered was that Chiesa's run had left Gianluigi Buffon wrong-footed.
Chiesa celebrated wildly, and his father couldn't have been prouder. After all, Enrico Chiesa knows all about scoring against Juventus and was indirectly responsible for bringing Buffon to the club.
One of the most talented and adored strikers of his generation, Chiesa Sr. represented Italy at Euro 96 and the 1998 World Cup, and Fiorentina fans were delighted when he signed from Parma in 1999. The forward spent three seasons in Florence, netting two of his eight career goals against the Old Lady in January 2001.
That 2001 match was an important fixture for Juve, who were in crisis under Carlo Ancelotti, and Chiesa made it deeper, opening the score and then beating Edwin van der Sar with a dramatic free kick equaliser in a 3-3 draw.
By the end of the season, those missing two points prevented Juve from finishing first, prompting revolutionary changes. Van der Sar was offloaded to Fulham, replaced by Chiesa's former Parma teammate, Buffon. Federico was a three-year-old toddler at the time, but won against his father's old friend 16 years later.
While he didn't get official credit for the effort, the confidence boost was immense. The young star proceeded to score his first "real" goal against Chievo just a week later, and then netted against Genoa too. He finished the season with three strikes to his name, but his overall contribution was the most important aspect of the progress.
Tireless and possessing boundless energy, Chiesa became fan favourite on the right wing, and everyone was delighted when his contract was extended until 2021. The breakthrough came extremely quickly, and it might have surprised quite a few people at the Fiorentina academy who didn't rate Chiesa highly.
The basics were there, of course. Not only does he possess the right genes, but his first coach at tiny Settignanese was another Fiorentina legend, the great Swedish striker Kurt Hamrin. However, upon joining the club at the age of 10, Chiesa was not considered good enough and was often sent to train with younger kids.
To his credit, Enrico never tried to push Federico or make special demands. As Hamrin remarked: "I often talked to Chiesa about football, but never about his son."
In fact, the father made sure his son would have proper education if he failed to become a footballer. That is why Federico studied English at the American school in Florence, then went to college. He is still there, about to start chemistry courses.
"I wanted to study physics, but that is probably too demanding now," the youngster said.
The dream of becoming a physicist is dead because Chiesa found the right spot on the football pitch. He never felt comfortable in central midfield or attack, and youth coach Federico Guidi made the crucial decision to move him to the wing in the 4-3-3 system. The switch worked out perfectly for the youngster, who sees Angel Di Maria as his role model.
That is where he is different to his father. Enrico was mostly concerned with scoring goals, but Federico uses the speed inherited from his father to become a provider.
That doesn't mean that Chiesa avoids shooting. The majestic curling strike against Bologna on Saturday showed that, and such a superb finish proves that Chiesa could be destined for greatness. He is talented, bold, confident and lethal. Arguably even more importantly, his feet are firmly on the ground. Chiesa doesn't have any tattoos, and buying an expensive car is out of question for him. He is just a good boy from Florence, guided by his father, who was known for his sportsmanship.
"Federico hadn't changed at all despite becoming so popular. He is still humble and keeps the same friendships. He still wants to grow professionally and studies his opponents on video. He is never tired of learning. His secret is training very hard every day," Enrico told Gazzetta dello Sport about his son in the summer.
Fiorentina fans are disappointed to have seen a lot of stars sold in the summer, but Chiesa didn't intend to move, proud to wear the shirt of his beloved team. At a certain point, the club might be forced to cash in on him. Liverpool are rumoured to be one of the interested teams, but in the meantime he is flourishing in purple.
He visits Juventus again on Wednesday, and Buffon is already worried.