Leicester City's Jamie Vardy has now scored in eight successive Premier League games, having also been the last man to achieve the feat.
Television footage appeared to show a supporter making racist gestures in the direction of Manchester United's Fred and Jesse Lingard.
Two goals from veteran striker Besart Berisha helped Western United claim a 3-1 victory over Melbourne Victory in their A-League derby.
The battle to bring Jadon Sancho back to England is heating up, with three Premier League clubs going head-to-head.
Manchester United midfielder Fred blamed a "backward society" for the reason behind the alleged racist abuse suffered at the Etihad Stadium.
Manchester City were regularly exposed on the counter by Manchester United and head coach Pep Guardiola admitted his side had no answer.
Fred was arguably the man of the match in the Manchester derby, according to his manager Ole Gunnar Solskjaer.
Manchester United players appeared to be targets of racist abuse in Saturday's derby, angering Marcus Rashford and Gary Neville.
Manchester City saw their Premier League title hopes dented by a home defeat to Manchester United - but Pep Guardiola will not give up yet.