Leicester extended their lead at the top of the Premier League to five points thanks to Leonardo Ulloa's 89th minute winner against Norwich. The Foxes had struggled to break down the Canaries, until subsitute Ulloa popped up at the far post to convert Marc Albrighton's cross, giving the leaders a 1-0 win. Elsewhere, Chelsea came from behind to win 2-1 at Southampton. Shane Long put the hosts ahead just before half-time, but Cesc Fabregas levelled matters with a quarter of an hour remaining. Branislav Ivanovic's header then secured all three points for the champions in the final minute, and extended their unbeaten league run under Guus Hiddink to 11 games.Meanwhile, West Brom raced into a three-goal lead at home to Crystal Palace, but were forced to hold on by the end after a double from Connor Wickham. Aston Villa's miserable season continued with a 2-1 loss at Stoke, West Ham moved up to 5th place in the table with a 1-0 victory over Sunderland, and Watford against Bournemouth ended goalless. In today's Premier League action, Manchester United welcome Arsenal to Old Trafford and Spurs host Swansea, whilst Liverpool and Manchester City battle it out for the season's first piece of silverware in the League Cup final.