Dan Walker and guests preview a busy weekend of football up and down the country. There are three Premier League derbies to look forward to as Manchester United take on Manchester City at Old Trafford, Sunderland host fellow strugglers Newcastle at the Stadium of Light, and the faltering champions Chelsea travel across London to take on a resurgent West Ham. There is also a look ahead to the rest of the weekend's games, plus analysis of the latest news and talking points.