In this week’s Sport: West Ham boss Sam Allardyce opens up about star signings, dealing with the boo boys and managing in the Premier League | Samir Nasri on chasing down Chelsea, mood at Manchester City and why he was right to leave Arsenal | Dina Asher-Smith talks about being a teenager, history student and world-class British sprinter | Bradford’s Billy Clarke on his side’s dream FA Cup run as they set their sights on a place at Wembley | Plus: England football ace Eni Aluko in Sport Uncovered