Olympic gold medalist Faith Kipyegon runs a 4:06 mile, setting a world record, but falls shy of being the first woman to run a sub-4-minute mile. (0:20)Open Extended ReactionsPARIS -- Three-time Olympic champion Faith Kipyegon failed in her bid Thursday to become the first woman to run a mile in under four minutes. Her time was better than her world record of 4:07.64 but won't be recognized by the international federation because the Nike-sponsored event dubbed " Breaking4: Faith Kipyegon vs. the 4-Minute Mile " was unofficial. She appeared to struggle midway through the race and failed in her attempt to shave at least 7.65 seconds off her world record. Kipyegon set the women's mile world record nearly two years ago during a Diamond League meet in Monaco.