There were many eyes on the coming together between Arsene Wenger and Jose Mourinho on Sunday as Chelsea secured a 2-0 victory over Arsenal, but was another huge incident missed at Stamford Bridge?
Well, the Mirror have provided footage that indicates that Gunners forward Alexis Sanchez punched Chelsea defender Branislav Ivanovic during the contest.
Sanchez, who signed for the north London outfit this past summer from La Liga giants Barcelona, appeared to hit out at the Blues full-back. Ivanovic, though, didn't make anything of the incident as he went to pick up the ball for a throw in, whilst the Chilean forward fell down to the ground.
Referee Martin Atkinson must have missed the punch as he attempted to get to grips with the lively contest. Ivanovic was previously involved in one of the most controversial on-field clashes in recent time when Luis Suarez bit him back in 2013.
Bad day for Arsenal
It was certainly a day to forget for Arsenal, Wenger and Sanchez at the Bridge as they were comfortably beaten by Mourinho's side. Eden Hazard and Diego Costa scored for the Blues, with former Gunner Cesc Fabregas producing a fine performance.
After their first domestic defeat of the season, the north London outfit are already some way off the pace at the top and trail Chelsea by nine points after just seven fixtures.
Chelsea on fire
Chelsea, on the other hand, continue to produce the goods, and look the team to beat this season. With six wins from their opening seven games, Mourinho's side already hold a five point advantage over their nearest rivals Manchester City.
The Blues are next in action on October 18 as they travel to Selhurst Park to take on Tony Pulis' Crystal Palace side after the international break. Arsenal, meanwhile, play host to Hull City in a repeat of last season's FA Cup final and will be hoping to make up some ground on their London rivals.
Arsenal and Chelsea fans: Did you see the incident involving Sanchez and Ivanovic? Tell us what you think about it by having your say in the comments section below!