In this week’s Sport: George North on coming back from concussion and his Rugby World Cup hopes | England v Wales – ahead of the clash of the World Cup so far, David Flatman takes a forensic look at the two teams | Our exclusive interview with Anthony Davis: the man who has signed the biggest contract in NBA history | Chelsea keeper Asmir Begovic on Diego Costa, Jose Mourinho and turning things round after his team’s slow start | British cyclist Lizzie Armitstead looks ahead to riding for World Championships gold this weekend | Mark Cavendish and Sir Chris Hoy on six-day track racing returning to London | Sport Uncovered: jockey Oisin Murphy on the diet that keeps him small but strong | Plus: Pele reveals his sporting idols and his remarkable recall for dates