It's clearly too early to call Chelsea's visit to Man City a pivotal game in the race for the 2015/16 Premier League title, but try telling that to City fans after their team out-battled and out-thought champions Chelsea to win a heated game 3-0.
Chelsea manager Jose Mourinho had endured a torrid week even before this fixture, the ongoing saga with his own medical staff striking an actually quite bizarre subtext ahead of their trip to Manchester. And it seems like all is not well in the Chelsea camp; having played every minute of the campaign last season, captain John Terry was substituted at half time with the away side a goal behind, and although reports suggested he had suffered a 'slight twinge', the cynics among us would wonder if all is as it seems.
Further news is sure to come out in the wash this week, but Terry being withdrawn at the halfway point in a huge game is almost unheard of and it is sure to raise eyebrows all over the media who will doubtlessly pick over this result with a fine-toothed comb anyway.
After what was a comprehensive win for Manuel Pellegrini's men despite Chelsea having a few chances, they now sit proudly at the top of the Premier League betting and are just 2.3411/8 to win back the trophy they last lifted in 2014.
If the reaction in this market after City's win over West Brom was perhaps a little severe, it doesn't seem like it after this affair - Pellegrini's team looked every inch the best side in the country and the Stamford Bridge outfit are now already five points behind their rivals after just two games.
At the other end of the table it was more disaster for Dick Advocaat and Sunderland as they were blitzed for the second week in the row against a team who are likely to rival them in the relegation battle. It was Norwich doing the damage this time around, the Canaries eventually emerging comprehensive 1-3 winners, and the Black Cats have already been installed as odds-on, 1.758/11 favourites for relegation.
But despite Sunderland's travails, no-one in football will be feeling as angry as Mr Mourinho, who is about to face the most difficult week of his second stint as Chelsea manager.
Having 'bored' their way to the title last season, this week in west London is set to be anything but boring.
Full Premier League results:
Southampton 0-3 Everton
Sunderland 1-3 Norwich
Swansea 2-0 Newcastle
Tottenham 2-2 Stoke
Watford 0-0 West Brom
West Ham 1-2 Leicester
Crystal Palace 1-2 Arsenal
Man City 3-0 Chelsea
Liverpool v Bournemouth