Randal Kolo Mauni shot Juventus into Serie A's Champions League positions after netting a brace, including the late winning penalty, in Friday's 2-1 win at Como.
France forward Kolo Muani took his Juve tally to five goals in three matches as he begins his loan spell from Paris Saint-Germain in fine form.
After ramming home Juve's 34th-minute opener from a tight angle Kolo Muani was cool from the penalty spot with a minute remaining after Federico Gatti was clattered by Como goalkeeper Jean Butez.
Thiago Motta's side are only one point ahead of Fiorentia and Lazio who face Inter Milan and Monza this weekend.
Kolo Muani became the first player since Roberto Baggio in 1990 to score in his first three Serie A matches for Juve when he smashed home from a tight angle.
But another winter window signing levelled the scores for the hosts on the stroke of half-time when Assane Diao headed in Patrick Cutrone's pinpoint cross.
Como, who are just two points above the relegation zone and brought in a host of players over the last few weeks, were at times the better team at the Stadio Giuseppe Sinigaglia.
But Kolo Muani is in lethal form and snatched the points for Juve, who have been boosted by the 26-year-old's presence up front.
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