The Argentine duo were in fine form to inspire the home team in the second half, as they racked up a third consecutive Serie A win.
The Argentine duo were in fine form to inspire the home team in the second half, as they racked up a third consecutive Serie A win.
The Argentine settled the game with an impressive goal in the first-half, stretching the home side's lead at the top of the table to seven points.
The Giallorossi move second in the Serie A table after seeing off their city rivals in a typically feisty game to continue their long unbeaten run in derby games.
Goals from Sami Khedira, Mario Mandzukic and Hernanes sent Allegri's men to a comfortable three points which keep them in charge at the Serie A summit.
The visitors had the chance to take the lead from the spot, but Niang erred and the Belgian took full advantage to keep his side four points behind Juventus.
Alex Sandro, Daniele Rugani and Mario Mandzukic did the damage for the Turin giants, with their opponents seeing a winning run brought to an abrupt halt.
The German midfielder's fine second half finish was enough for the Bianconeri to pick up a second consecutive Serie A win.Sami Khedira's second goal in as many games secured Juventus a 1-0 Serie A triumph at Lazio on Saturday despite new signing Gonzalo Higuain starting on the bench once again.
Andrea Belotti netted his 11th Serie A goal of the season, but the visitors hit back through two goals from their Argentine forward and Miralem Pjanic.
The hosts scored twice in the opening six minutes as they eased to a win that keeps them in touch with the Champions League chasing sides.
Last term's Serie A top scorer marked his first appearance in Bianconeri colours with a decisive contribution, giving the hosts a winning start to their title defence.