Cristiano has now scored 18 goals so far this season and leads the table of strikers with a Juventus that is getting its house in order to go up against Atletico Madrid on February 20 at Metropolitano Stadium in the Champions League quarterfinals, reports Efe news.
Allegri said: "We had a risk early on that (goalkeeper Wojciech) Szczesny dealt with, but after a quarter of an hour we started to play".
Juve might have lacked a creative presence in and around the penalty area with Dybala being dropped but Khedira's all-action display ensured the Argentine playmaker was not missed.
The home squad got on the board in the 23rd minute when Sami Khedira recovered a block by Sassuolo keeper Andrea Consigli after a shot by Cristiano and pushed the ball into the net for his second league tally of the year after scoring his first last week against Chievo.
Milan's opener was an own-goal as Cagliari goalkeeper Alessio Cragno parried Suso's effort and it came off teammate Luca Ceppitelli. Ronaldo, who leads the Serie A scoring charts, doubled his side's lead by nodding in from six yards and Emre Can came off the substitute's bench to finish off a flowing team move with a low finish four minutes from time.
It was Piatek's fourth goal in three starts for the Rossoneri but Paqueta's first for Milan and he dedicated it to the victims of the fire at the training ground of his former club Flamengo.
Frosinone pulled off a shock 1-0 win at Sampdoria.
Lionel Messi was short of fitness and Barcelona lacked spark as a goalless draw away to Athletic Bilbao on Sunday in La Liga offered fresh hope to its rival in the title race.
The forward has been a hit at the Bianconeri since his arrival from Real Madrid, where he spent nine successful years.
Messi was not at his best and neither was Barcelona, which would even have lost had it not been for Marc Andre ter Stegen's stunning late save to deny Inaki Williams. Atalanta's Duvan Zapata had briefly gone level on goals for the season with a goal against SPAL.
Bundesliga: Werder Bremen 4 (Rashica 5, 28, Eggestein 27, Mohwald 83) bt Augbsburg 0; Fortuna Dusseldorf 3 (Karaman 34, Fink 49, Raman 85) bt VfB Stuttgart 0.