TOPSHOTS World heavyweight champion Wladimir Klitschko from the Ukraine warms up for a public training session on May 1, 2013 in Heidelberg, western Germany. Klitschko will defend his IBF, IBO, Super WBA and WBO belts against his challenger, Italian-born Francesco Pianeta on May 4, 2013. AFP PHOTO / UWE ANSPACH / GERMANY OUT