When they did, it came in curious circumstances: Marquinhos appeared to be brought down in the area by Angelo Ogbonna and Danilo D’Ambrosio and while the referee did not immediately award a penalty, a consultation with his assistant had him belatedly pointing to the spot.
The decision led to Torino coach Giampiero Ventura being sent to the stands for his protests, and Osvaldo finally gave the hosts the lead from 12 yards to further compound the visitors’ frustrations.
Roma appeared to confirm Zeman's reputation as a maverick when they unusually lined up for the kick-off with nine players on the halfway line and only two behind.
Roma dominated play before the opener, and unsurprisingly continued to look for a second which finally came five minutes from time when Bosnian international Pjanic’s shot took a deflection off Alessandro Gazzi and beat goalkeeper Jean-Francois Gillet.
The attack-minded Giallorossi, who have the best scoring record in Serie A and the third worst defence, kept a clean sheet for only the second time this season in a 2-0 win over Torino.
Roma are sixth after the win, seven places above Torino, but remain 12 points off Serie A leaders Juventus and three behind rivals Lazio in fifth.