With World Cup host city Volgograd gripped by a heatwave, Japan will aim to conserve energy and make the most of their substitutions in their final group-stage match against Poland, coach Akira Nishino said Wednesday.Nishino said he had been surprised by conditions in the southwestern Russian city, where temperatures are forecast to hit 37 C by the time the pivotal Group H clash kicks off Thursday evening."When I landed yesterday, I was struck by how humid it was. It was probably more than I expected," Nishino said.The 63-year-old said the weather would influence his planning for the match,…READ FULL ARTICLE