It felt like vindication - if you still needed it - of Mikel Arteta and the remarkable job he is doing at Arsenal.
The changing of the guard from ageing, egotistical striker to vibrant, young and exciting team was never so evident than at Stamford Bridge. This was a big, hugely-impressive statement victory for Arsenal as they reclaimed top spot from Manchester City - and one which might just keep them there for Christmas.
At some point, we might actually need to start taking Arsenal seriously as title contenders because they are still top, still ahead of City and still determined to last the pace. It might not be their biggest win of the season so far, but it was definitely Arsenal’s most impressive result of this campaign to date.