Southampton missed out on the opportunity to go five points clear at the top of the npower Championship as Blackpool stormed to an impressive 3-0 victory.
Billy Sharp missed a first-half penalty for Saints and they were made to pay a heavy price.
Stephen Dobbie succeeded where Sharp had failed before adding a second on his first appearance at Bloomfield Road since returning to Blackpool on loan from Swansea.
Recalled wing duo Tom Ince and Matt Phillips caused no end of problems for Southampton in an enterprising first-half display and Ian Evatt sealed the points when he was allowed a free header from the latter's corner seven minutes after the interval.
Nigel Adkins' side missed the thrust of injured top scorer Rickie Lambert in attack and Reading's victory over promotion rivals West Ham earlier in the day means their lead at the top has been trimmed to two points.
Blackpool are back in the play-off places on goal difference with six games remaining.