Manchester City midfielder Kevin De Bruyne was named the Premier League's Player of the season on Saturday, with his team-mate Phil Foden taking the Young Player prize for a second successive year.
After the incident, Stefan Savic was seen dragging Phil Foden back to the pitch, head butting City's Raheem Sterling and also pulling Jack Grealish's hair.
Manchester City survived a late scare after Everton's shout for a penalty was waived away after a VAR review for a handball by midfielder Rodri.
Joao Cancelo took to Instagram on Thursday and revealed that he was attacked by "four cowards".
Premier League: Manchester City beat Brentford 1-0 on Wednesday to extend their lead at the top of the Premier League to an ominous eight points as title rivals Chelsea conceded a last-gasp equaliser at home to Brighton.
West Ham ended Manchester City's four-year hold on the League Cup on Wednesday as Liverpool and Tottenham booked their places in the quarter-finals.
Manchester City twice came from behind to prevent Liverpool moving back to the top of the Premier League in a pulsating 2-2 draw at Anfield on Sunday.
Euro 2020: Phil Foden missed England's training session on Saturday ahead of the final against Italy at Wembley.