London: West Ham United humbled holders Manchester United 4-0 on Tuesday to reach the League Cup semi-finals with Old Trafford reject Jonathan Spector scoring twice in the swirling snow at Upton Park.
With the crowd scarcely believing their eyes, striker Carlton Cole added two second half goals as the bottom team in the Premier League blew away United`s 29-match unbeaten run in all competitions.
Arsenal overcame Wigan Athletic 2-0 at the Emirates Stadium in the other all-Premier League quarter-final clash on a freezing night in the capital.
Birmingham City host top flight rivals Aston Villa, last season`s losing finalists, in a Midlands derby on Wednesday when Roy Keane`s struggling Championship (second division) side Ipswich Town are at home to West Bromwich Albion.
Manchester United, top of the league and winners of the League Cup for the past two seasons, made wholesale changes from the side that blew aside Blackburn Rovers 7-1 at the weekend and were given a taste of their own medicine.
Alex Ferguson`s men were still fancied to see off the Premier League`s tail-enders but U.S. international defender Spector, playing in a central midfield role, ripped up the script with his first goals in English soccer.
Spector, who spent three years on Manchester United`s books and made just eight starts before moving to Charlton Athletic on loan and then joining West Ham in 2006, opened the scoring with a looping 22nd minute header off a Victor Obinna cross.
The 24-year-old, who last played for West Ham when they lost to United in August, made it 2-0 in the 37th when Obinna again caused mayhem in the area and Spector lashed a loose ball home at the near post.
West Ham thought they had scored after 17 minutes when Obinna`s shot was deflected into the net off Spector, who was belatedly ruled offside.
Arsenal, making nine changes from the side that beat Aston Villa 4-2 away in the league on Saturday, started slowly but took the lead three minutes before the break through an Antolin Alcaraz own goal.
The Gunners made it 2-0 in the 67th when Nicklas Bendtner bundled the ball in at the far post.