Premier League: the weekend's matches – in pictures

Arsenal's Jack Wilshere fights for the ball with Jonas Olsson of West Bromwich Albion Photograph: Andy Rain/EPA

Steven Reid gestures to Arsenal's Santi Cazorla after losing out on a controversial penalty decision Photograph: Ian Kington/AFP/Getty Images

The Arsenal manager, Arsène Wenger, looks unhappy despite his side's victory Photograph: Clive Mason/Getty Images

Aston Villa's Brad Guzan and Stoke City's Kenwyne Jones knock heads Photograph: Peter Cziborra/Action Images

Jason Puncheon of Southampton celebrates scoring their first goal as Jobi McAnuff of Reading looks dejected Photograph: Christopher Lee/Getty Images

Chelsea's Fernando Torres scores his first goal of the game against Sunderland at the Stadium of Light Photograph: Owen Humphreys/PA

Sunderland's Sebastian Larsson concedes a penalty with a challenge on Chelsea's Ramires Photograph: Nigel Roddis/Reuters

David Luiz gets caught in the middle of team-mate Petr Cech and Sunderland's Connor Wickham Photograph: Lee Smith/Action Images

The Swansea City goalkeeper Gerhard Tremmel looks dejected after Norwich City score their second goal of the game Photograph: Nick Potts/PA

Swansea City's Michu celebrates scoring but the goal is disallowed Photograph: AFP/AFP/Getty Images

The QPR manager Harry Redknapp screams for a win as the Wigan manager Roberto Martínez looks on Photograph: Paul Burrows/Action Images

Queens Park Rangers' Ryan Nelson celebrates scoring Photograph: Martin Rickett/PA