Rickie Lambert's 35th-minute free-kick proved enough to seal a 2-1 win at St Mary's after an early opener from Jay Rodriguez had been cancelled out by a header from John Terry.
Chelsea's shock loss allowed Tottenham to leapfrog into third place with a 2-1 win at Swansea.
More top news
Parents fear council plans to expand Aldryngton Primary School in Wokingham will make an already dangerous traffic problem, even worse.
Simon's Blog - Winter Wonderland
Tuesday night's weather for the west of the region