Melissa Jefferson-Wooden edged Sha'Carri Richardson in a thrilling photo finish to win the women's 100 meters at the Prefontaine Classic on Saturday, while Nigeria's Kayinsola Ajayi stunned world leader Oblique Seville in the men's race. Richardson is known for her extraordinary closing speed but ​could not hold off reigning world champion Jefferson-Wooden, who charged down the final metres to break the tape in 10.78 ‌and win by one hundredth of a second in Eugene. Twenty-year-old Adaejah Hodge