LOS ANGELES: Katie Ledecky crushed her own women’s 800m freestyle world record on Monday, clocking a stunning 8min 6.68sec to win at the Pro Swim meeting in Austin, Texas. The 18-year-old American obliterated the previous record of 8:07.39 that she set at the 2015 World Championships last August 8 in Kazan, Russia. She upstaged superstar Michael Phelps, who blazed to victory in the 200m individual medley to notch his first win over rival Ryan Lochte in the event since the 2012 London Olympics. Phelps, whose 18 Olympic gold medals include three in the 200m individual medley, powered through the final 25 meters of the closing freestyle leg to win in 1:58.00sec. Lochte, the current world record-holder in the event, held a narrow lead at every turn but settled for second in 1:58.43. Phelps finished the three-day meet with two victories — including his 100m butterfly win on Friday — and a fourth place finish in the 200m freestyle.