Olympic champion Gregorio Paltrinieri of Italy won the men's 1500m freestyle final at the world championships on Sunday to retain the title he won two years ago in Kazan. Paltrinieri clocked 14 minutes, 52.07 seconds with Ukraine's Mykhailo Romanchuk taking silver at 1.29 back and Mack Horton of Australia earning bronze at 11.85 behind. Romanchuk g...