Sterling's quickfire treble secured a 3-1 win against Watford on Saturday and saw them open up a four-point cushion at the top of the Premier League ahead of challengers Liverpool's match against Burnley.
The latest example of his quality came with an incredible 13-minute hat-trick against Watford.
But his dead-eyed ruthlessness to capitalise, taking the game away from Watford and moving on to 15 Premier League goals this season again underlined the impressive strides the former Liverpool man has taken under Guardiola.
The linesman raised his flag for offside, but referee Paul Tierney overruled the decision.
"We are now investigating these matters and will allow Manchester City every opportunity to explain the context and detail surrounding them".
"I am sorry for Allegri".
"Some referees say it is, sometimes another one says no".
"It should be here this season but next season VAR (will be implemented) and that will not be a problem, and it will be more fair".
A statement read: "The Premier League has previously contacted Manchester City to request information regarding recent allegations and is in ongoing dialogue with the club".
"So, hopefully next season like in Europe it can install the VAR and this kind of situation will be fair".
Nicolas Otamendi also headed wide of the far post as Watford struggled to contain a team desperate to improve their goal difference, but City were left to settle for three goals and three points as they took another step forward to retaining their league crown.
"All we can do is focus on ourselves, but let's hope we can get a bit of luck as well".
Two of Palace's joint-owners, Josh Harris and David Blitzer, are said to have been among those chiefly involved in calling for the Premier League to act on City's alleged breach of regulations. "Impossible. Except if they sack me and after I go home".
"I know exactly what the guys are doing for the last two seasons and more".
"I am not going to Juventus in the next two seasons".
The decision appeared to be over-ruled because Daryl Janmaat, the Watford defender, played the ball against Sterling as the City striker aimed for goal.
"It is hard to understand why we changed so much from the first half to the second".
The Hornets put up a good fight in the first half, but their resistance crumbled after the break.
"In the second, the game changed".