Vitali Klitschko has warned Tyson Fury not to abuse his body ahead of his blockbuster bout with Oleksandr Usyk. The two men will lock horns on May 18, having originally been pencilled in to fight last month. Their showdown was delayed, however, after Fury sustained a serious cut above his eye while sparring. Fury has been taking his fight with Usyk extremely seriously, with the 35-year-old often taking to social media to show off his impressive physique. The Briton is eager to prove a point having struggled during his narrow win over Francis Ngannou in October. And Klitschko has now fired a wa…