epa03683854 Ukrainian heavyweight boxing world champion Wladimir Klitschko (L) performs with his coach Johnathon Banks (R) during a public training at the Olympic center in Heidelberg, Germany, 01 May 2013. WBO, IBF and WBA heavyweight champion Klitschko will be challenged by Italian-German boxer Francesco Pianeta on 04 May 2013 in Mannheim. EPA/UWE ANSPACH