Liverpool now hold a two-point lead over City, but the defending champions have a game in hand.
Manchester City manager Pep Guardiola refused to be drawn on the report at his pre-match press conference on Friday.
Arsenal star Mesut Ozil took to Twitter to celebrate his sides victory over Manchester United and included a dig at Jesse Lingard.
Manchester United slipped to their first domestic defeat under Ole Gunnar Solskjaer at Arsenal.
A 4-2 victory over Burnley hauled Liverpool back to within a point of Premier League leaders Manchester City.
A 3-1 victory over Watford, helped Manchester City open up a four-point lead at the top of the Premier League.
Premier League: Southampton Stun Fading Tottenham Hotspur, Newcastle Edge Five-Goal Everton Thriller
Mauricio Pochettino's men threw away an early lead through Harry Kane to lose 2-1 at Southampton.
Having beaten Crystal Palace in December, Brighton secured their first win at Selhurst Park since 2005.
Real Madrid, Atletico Madrid and Barcelona have all been sanctioned for similar offences, but all three managed to delay the ban pending appeal to allow them extra time to prepare.
Chelsea were indebted to Kepa Arrizabalaga for a series of superb saves that preserved their lead after the break.
Brendan Rodgers was given a tough welcome back to the Premier League when substitute Andre Gray pounced on Troy Deeney's fine through ball.
Harry Kane's contentious penalty 16 minutes from time ensured Tottenham maintain a four-point lead over Arsenal in the fight for top-four finish.
Claudio Ranieri was in charge for just 16 league games but won only three matches.
Jurgen Klopp's men calmed fears over their staying power following a recent dip in form as they chase down their first top-flight title since 1990.
Ole Gunnar Solskjaer had to make three first-half substitutions during the 0-0 draw with Liverpool as Ander Herrera, Juan Mata and Jesse Lingard all hobbled off injured.
Brendan Rodgers was confirmed Leicester City manager just before kick-off at the King Power after dramatically leaving Celtic.
The fall-out from Maurizio Sarri's astonishing row with Kepa Arrizabalaga threatens to cause further damage in a crucial London derby against Tottenham.
Manchester United and Liverpool played out a goalless draw, while Arsenal returned in top four with a 2-0 win over Southampton in the Premier League.