Women 's 100 m champion Oludamola Osayomi tests for banned stimulant . Nigerian has requested her B sample be released ; results will be known on Wednesday . Osayomi was given gold medal after previous winner Sally Pearson was disqualified for false start . Winny Chebet missed out on a silver medal due to a late fall . Pearson came back on Monday to triumph in her main event , the 100 m hurdles .
Women 's 100 m champion Oludamola Osayomi tests for banned stimulant . Nigerian has requested her B sample be released ; results will be known on Wednesday . Osayomi was given gold medal after previous winner Sally Pearson was disqualified for false start . Pearson came back on Monday to triumph in her main event , the 100 m hurdles .