Southampton beat Chelsea with 2-0 at Stamford Bridge
Chelsea slumped to another shock home reverse, losing 2-0 to Southampton, on Boxing Day.
After the highs of victory at Spurs as Frank Lampard got one over on his former manager Jose Mourinho, Chelsea again struggled when faced with breaking down stubborn defensive opponents in Southampton.
The Blues have now lost to West Ham, Bournemouth and the Saints in their last four home league games.
Southampton boss Ralph Hasenhuttl rested in-form talisman Danny Ings, but that decision paid off as his replacement Michael Obafemi scored just his second Premier League goal with a calm finish into the top corner on the counter-attack.
The visitors struck again to seal all three points 17 minutes from time when Nathan Redmond prodded past the onrushing Kepa Arrizabalaga at the end of a fine team move.