Italy's Serie A 2014-opening blockbuster did not disappoint as defending champions Juventus struck what could prove to be a fatal blow in the race for the Scudetto.
Their clash with unbeaten Roma - their nearest rivals in second - brought three goals and two red cards, with the strikes going to Juve and the dismissals to the visitors as Rudi Garcia's men were turned over 3-0.
Vucinic's goal came from the spot at the end of a shocking minute for Roma which also saw Daniele De Rossi and Leandro Castan sent off inside 86 seconds.
Elsewhere, Gonzalo Rodriguez scored the only goal of the game to earn UEFA Champions League-chasing Fiorentina a narrow 1-0 win at home to Livorno.
Rodriguez headed home a corner midway through the second half to keep the hosts in contention for a top-four place.
The win came at a cost, though, as La Viola striker Giuseppe Rossi suffered a possible injury setback after hurting his knee during the victory.
La Viola confirmed the Italy international had suffered a "sprain" to his right knee, the joint in which he has twice damaged cruciate ligaments.
In the other game, Mauricio Pinilla missed a second-half penalty as Cagliari were held to a goalless draw by strugglers Chievo.