Vitali Klitschko is graying at the temples and is making the inexorable march toward his 40th birthday, but the World Boxing Council heavyweight champion says he feels better physically than he did when he was in his 20s. Klitschko, who defends his title on Saturday at the O2 World Arena in Hamburg, Germany, against the long-forgotten Shannon Briggs, is fighting as if he?s just now moving into his peak.
