(Eugene, OR)  --  Nigeria's Tobi Amusan is celebrating after setting a new world record in the women's 100-meter hurdles.  The 25-year-old finished with a time of 12-point-12 seconds to win a thrilling semi-final race at the World Athletics Championships in Oregon on Sunday.  Amusan held nothing back at Hayward field in Eugene for the pre-championship event.  The stellar performance came after she set the African record just the day before.  She finished with an even faster time in the final, finishing in just twelve-point-oh-six seconds, but there was too much tailwind to make it a new record.