Federico Bernardeschi had the last laugh as he returned to his former club Fiorentina with its historic rival Juventus and scored in a 2-0 victory that put the reigning champion back on top of Serie A.
The 23-year-old angered Fiorentina fans in pre-season when he crossed the rivalry that was intensified by Robert Baggio's switch to Juve in 1990 and he silenced the jeers with a second-half free-kick, before Gonzalo Higuain wrapped things up late on in Massimiliano Allegri's 200th game in charge.
For the most part, the first half was a cagey affair, with a controversial VAR decision which ultimately denied Fiorentina an early penalty chief among the few highlights.
The best opportunity in a first period otherwise devoid of them fell to the hosts just before the break and Juve could count itself lucky to escape, as the lively Gil Dias fired against the right-hand post of Gianluigi Buffon, who was making his 500th league appearance for the Turin giant.
Initially, proceedings were not hugely improved upon the restart, but Bernardeschi, who has been hit-and-miss since costing Juve €40 million ($62.9 million), managed to heat things up, netting 10 minutes into the second half.
Juve was forced to withstand plenty of pressure towards the end, although its ever-dependable backline held firm and it hit Fiorentina on the break, as Higuain rounded things off four minutes from the end to move it two points ahead of Napoli at the top of the table, with Maurizio Sarri's men facing Lazio on Sunday (AEDT).
Although Juve dictated possession during the early exchanges, Fiorentina did an excellent job of restricting its flow of chances, with a Claudio Marchisio effort from 30 yards, which was easily saved by Marco Sportiello, all it could muster.
Fiorentina then seemed to be presented with the perfect chance to take the lead 18th minutes in, as Giorgio Chiellini was penalised for appearing to handle Marco Benassi's cross inside his own area.
But, after much deliberation, Jordan Veretout was denied the opportunity to take the kick, as VAR (video assistant referee) identified Benassi in an offside when he received the ball even though the ball appeared to be played to him by Alex Sandro.
Despite that disappointment, Fiorentina seemed to improve thereafter and went agonisingly close to the opener six minutes before the break, Dias breezing past Stephan Lichtsteiner and shooting right-footed on to the left-hand post.
Juve was no better as an attacking entity at the start of the second half, with the pattern of the game initially unchanged.
But Bernardeschi's quick feet on the edge of the box in the 56th minute secured Juve a free-kick and the Italy international picked out the bottom-left corner, exploiting Sportiello's poor positioning.
That forced Fiorentina to become more forward-thinking, though that almost resulted in Juve catching it on the break 11 minutes later with Mario Mandzukic shooting just wide after Douglas Costa's cut-back.
Buffon had to be alert soon after, rushing out to block Cyril Thereau's close-range effort after a driving run courtesy of Giovanni Simeone.
Juve capitalised on Fiorentina's desperation for an equaliser, hitting the hosts on the break towards the end as Higuian coolly swept past Sportiello for his sixth goal in four games across all competitions.