Arsenal boss Arsene Wenger is "deeply disappointed" after a Laurent Koscielny own goal meant his team lost 2-1 at home to Premier League leaders Chelsea.

Fernando Torres put the visitors ahead early in the first half, before Gervinho levelled the match just before half-time.

Koscielny's touch on Juan Mata's free-kick gave Chelsea the win and left Wenger reflecting on two "cheap goals" conceded by his players.