Ten-man Sampdoria recorded the unlikeliest of victories as they shocked home side Juventus 2-1 on Sunday.
The hosts missed the chance to reclaim an eight-point lead at the top of Serie A as they went down to a side that were in the relegation zone coming into the game.
Sebastian Giovinco's early penalty set Juve on their way and a red card for Gaetano Berardi just after the half-hour mark following two first-half bookings made a win for the Old Lady appear a formality.
However, Mauro Icardi equalised shortly after the break and then powered home the winner with a spectacular strike in the 69th minute.
Juventus were on the front foot from the word go and Giovinco almost had them ahead five minutes in but directed Simone Padoin's cross just wide.
The diminutive forward continued to prove a nuisance up front and in the 24th minute he scored from the spot after Claudio Marchisio had been fouled in the area.
After having given away the penalty and received a yellow card Berardi’s evening soon got far worse as he was dismissed for a second bookable offence in the 32nd minute.
The three points must have seemed all but secure for Juve but in the second period the 10-men of Sampdoria defied logic by scoring against the league leaders.
Buffon let an innocuous looking effort from Icardi sail past his for the visitor’s first as they began to assert themselves.
Andrea Barzagli's attempt from range was wasteful for Juventus as their visitors took the game by the scruff of the neck and bagged a second with just over 20 minutes remaining.
Icardi produced an absolutely blistering effort that left Buffon helpless as Delio Rossi’s side eyed an improbable victory.
Mirko Vucinic rattled the crossbar as the host attempted to salvage something from the game but when Claudio Marchisio was forced off through injury, leaving both sides with 10 men, Juve were unwilling to find a breakthrough.