Chelsea suffered their second defeat of the season as Southampton outbattled and outfought Thomas Tuchel's side on Tuesday night.
The Blues had taken the lead through Raheem Sterling early in the first half, but goals before half-time from Romeo Lavia and Adam Armstrong completed the first-half turnaround, and the west Londoners never really responded in the second half.
In fact, it could have been 4-1 if it wasn't for the defensive brilliance of Marc Cucurella and Thiago Silva. With all Chelsea games, there are injury woes, and this fixture certainly didn't disappoint in that regard.
