In this week's Sport: our exclusive interview with Arsenal's Per Mertesacker ahead of a huge week for his team | British snowboard cross star Zoe Gillings explains why she's a geek in a mega-cool sport | GB curling captain Eve Muirhead reveals why she has the stones to do well in Sochi | Our World Cup Stories continue with the little-known tale of the 11-toed Pole at the 1938 World Cup | Plus we preview the pick of this weekend's FA Cup ties and next week's Champions League action