The 3-1 loss put the Red Devils 12 points behind City at the top of the table, equidistant to Cardiff City in 18th, and they now have a negative goal difference.
Despite a hard first season for Guardiola in English football, City finished that campaign nine points ahead of their City rivals. "I know very well that I have to say thank you to the club because they gave me a very good squad, I have to say thank you to my players first of all and finally I have to say thank you to my staff", said Sarri.
City certainly seem untouchable at the moment.
United's lack of goal threat throughout the game meanwhile was emphasised by the gulf in the volume of shots both sides attempted.
Arsenal are now eight points behind leaders Man City and can be backed at [150.0] to win the title, but perhaps more significantly they are three points behind North London rivals Tottenham who won 1-0 at Crystal Palace on Saturday afternoon.
Guardiola also boasts an impressive record against Mourinho, losing just five of their 21 meetings. "I said I will work because we're winning".
Fast forward seven months and Mourinho has turned on his superiors at the club for his failure to match City's progression under Guardiola.
Yet Mourinho, as someone who obliterated defensive records with Chelsea in his first spell and attacking ones with Real Madrid, will be acutely aware that this season, at least, the statistics do accurately reflect his team's performances on the pitch.
Despite an upturn in results in recent weeks to dampen speculation surrounding Mourinho's future, United have still continuously started slowly and were again punished early on.
Paris Saint-Germain right-back Dani Alves has said he can not consider ending his career without sampling the Premier League. Marouane Fellaini, who made an impact off the bench in Turin, came in as Alexis Sanchez dropped out in favour of 2016 derby hero Marcus Rashford. United beat City to his signature from Arsenal in January to much fanfare at the time.
Vidić played for United from 2006 to 2014, making over 200 appearances during his time at Old Trafford and becoming a fan-favourite player. "Is Pogba? The answer is no, they're not getting the best out of these players".