Jay Rodriguez's goal after 13 seconds has given Southampton the lead against Chelsea at half time at Stamford Bridge.
The recently-capped England forward latched onto Michael Essien's poor back-pass with just seconds on the clock to fire past Petr Cech in the Chelsea goal.
Eden Hazard had a chance for the Blues, but his shot was charged down inside the area by the Southampton defence.
Jose Mourinho's side probed for the equaliser, but were unable to break down Southampton's typically stubborn resistance.
Adam Lallana made space for a shot after 40 minutes, but his 25-yard effort was dragged wide after initial good work to escape the attention of Essien.
Oscar had a chance moments later but his header was comfortably held by Artur Boruc following good work from Fernando Torres.
Torres was denied towards the end of the half by Boruc as the Poland keeper kept out the Spaniard's header.
