Aston Villa ended Chelsea's 18-match unbeaten streak in the Premiership following a 2-0 home win on Sunday. Defender Zat Knight scored on his Villa debut two minutes after re-start before Gabriel Agbonlahor ensured the win two minutes from time. The Blues have now failed to win at Villa Park since 1999. Chelsea are third in the Premiership table with 10 points, on level with leaders Liverpool who have one match in hand while Villa lie 11th on seven points. Knight, who arrived from Fulham in the close season, put the hosts ahead in the 47th minute when he rose above Didier Drogba to head home Gareth Barry's inswinging corner. Agbonlahor put the game beyond doubt shortly before the end when he converted in Luke Young's cross from the left flank.