3 takeaways from Chelsea's loss to Southampton: The misery continues for the Blues

Chelsea dropped all three points at Stamford Bridge for the second time this season as Southampton came back to win 3-1 on Saturday.

Goals from Steven Davis, Sadio Mane, and Graziano Pelle erased an early 1-0 deficit for Southampton.

Willian claimed the first goal in the 10th minute, but that was merely a consolation on a completely embarrassing night for Jose Mourinho's men.

Here are the three biggest takeaways:

Chelsea lacks composure in defence

There isn't one thing right about Chelsea's defence - the same unit that conceded the fewest goals (32) in the Premier League last season. Southampton's Dusan Tadic and Mane terrorized the backline all game, turning Branislav Ivanovic and John Terry inside out. Neither defender could keep pace with Southampton's speedy wingers.

It's a wonder how Mourinho can drop his captain for matches on end and not Ivanovic, who's clearly out of ideas and, more importantly, a detriment to his team every time the ball comes to him.

The goalkeeping hasn't been all that bad. Asmir Begovic acquitted himself well in relief of the injured Thibaut Courtois, whose pending return in December may not make a difference.

Still, Chelsea has conceded 17 goals this season. Only lowly Sunderland, which has yet to win in the Premier League this campaign, has allowed more (18).

The result leaves the London club with eight points from eight matches, which doesn't bode well.

Koeman has Southampton playing pretty football

Southampton plays like a complete unit, one that slowly came together against Chelsea. Mane and Tadic are unpredictable, and Pelle balances out the attack with his strong hold-up play. It was his little intervention that set up Southampton's first goal: Pelle chested down the ball for Davis, who slotted it into the bottom corner.

Their success is a product of manager Ronald Koeman's overall philosophy, which features lots of passes and interplay.

"The style is similar to what I grew up with at Barcelona," Southampton midfielder and ex-Chelsea man Oriol Romeu told Sportsmail. "The style of play and training sessions remind me a lot of La Masia. Our sessions are ball-focused, possession-based, small-sided games."

It worked on this occasion.

Willian remains the lone bright spot for Chelsea

Willian is emerging as the set-piece specialist for Chelsea. He has four goals in four matches, all coming off free-kicks with the same look: a curling effort off his right foot.

The Brazilian is the only player doing well during this current funk. Chelsea's struggling to get any kind of offence out of Eden Hazard, last year's Player of the Year, or Oscar, last year's designated free-kick taker. Playing Radamel Falcao is never a good idea, and Loic Remy continues to get the cold shoulder.

Cesc Fabregas isn't providing any inspiration, either, with just one assist in the league so far. He was even culpable on the first goal by Davis, standing and watching as his counterpart earned his team a lifeline right before half-time.

Willian, however, is the kind of player Mourinho loves: technically proficient, smart with the ball, resourceful, and defensive when needed. But the production of the 27-year-old alone isn't enough.