Cristiano Ronaldo became the first player to score 400 goals in Europe's top five leagues as Juventus dropped points for the first time this season following a 1-1 Serie A draw with Genoa on Saturday.
Cristiano Ronaldo scored but Juventus drew their Serie A home fixture against Genoa on Saturday.
Since 2003, Ronaldo has tallied 311 goals for Real Madrid, 84 goals for Manchester United, and five goals for Juventus.
The Croatian boss replaced Davide Ballardini before the worldwide break for his third spell in charge of Genoa and he made an immediate impact as the Italian champions failed to record a victory for the first time in nine league games this season. Daniel Bessa equalized in the second half to make it 1-1.
Alexis Sanchez was not present for Manchester United's training session on Monday ahead of their Champions League clash with Juventus at Old Trafford.
With Genoa struggling to contain the lively Cancelo down the right Juve were firmly in control, their only regret at the break being they weren't further in front.
Energised, the 23-year-old should have levelled seconds later, outjumping Leonardo Bonucci but his header went wide.
Allegri responded by introducing Paulo Dybala for Blaise Matudi as a frantic finale beckoned with Genoa holding on for a surprising point.
The atmosphere at the Allianz Arena was dampened after racist chants during Juve's last home league game against Napoli resulted in a closure of the "Curva Sud" section of the stadium.
Earlier, Roma came unstuck 2-0 to visiting minnows SPAL to dash their hopes of a fourth straight league win.