Arsenal held on to top spot in the Premier League with a 2-1 win at Swansea City after Tottenham Hotspur drew at home to Chelsea and both Manchester clubs suffered surprise defeats.

Arsenal's good run continued as they went two points clear at the summit with second-half goals from Serge Gnabry and Aaron Ramsey before a late consolation from Swansea's Ben Davies.

United suffered more misery when they went down 2-1 at home to West Bromwich Albion in their worst start to a Premier League season with the champions in the bottom half after six games.

Morgan Amalfitano and Saido Berahino scored for the visitors either side of a Wayne Rooney leveller at Old Trafford to leave United 12th a week after a crushing defeat at local rivals City.

City also suffered an unexpected reverse at Aston Villa, who scored three second-half goals to win 3-2.

Spurs stay second, two points adrift of their north London rivals, after a 1-1 draw at home to Chelsea where the focus was on the managerial battle between Portuguese coaches Jose Mourinho and his former apprentice Andre Villas-Boas.

Southampton's watertight defence held firm as they climbed to fourth spot with a 2-0 victory at home to Crystal Palace, Hull City won 1-0 against visiting West Ham United and Cardiff City triumphed 2-1 at struggling Fulham.