Nigerian born forward, Michael Obafemi and Nathan Redmond were the scorers on Boxing Day as Southampton shocked Chelsea at Stamford Bridge.
Southampton battled their way to a fourth league victory in six matches, and their second win on the spin away from home.
It was Frank Lampard’s men sixth loss in 15 Stamford Bridge matches in all competitions this term.
Chelsea also suffered consecutive home Premier League defeats for the first time since 2011 having fallen to Arsenal and Liverpool.
Lampard’s Blues remained fourth in the table despite their defeat
Obafemi and Redmond took their goals well as the Blues’ home struggles continued unabated.
Obafemi was put through on goal by captain Pierre-Emile Hojbjerg and seized on the space afforded by the tentative Fikayo Tomori to curl a smart finish past a helpless Kepa Arrizabalaga.
Redmond netted the second when Chelsea’s N’Golo Kante unwittingly sent the perfect ball into his path The pacy forward fired home and sealed the win for the Saints.