Kenya's medal hopes in the women's 800m at the 21st World Athletics U-20 Championships have been dashed after an appeal against a disqualification was denied.

• Jepngetich was disqualified for leaving her assigned lane before the breakline in Heat 2.
• Kenya will now rely on Marion Jepchumba in the semifinal after she finished 5th in Heat 5 with a time of 2:07.69.
• The failed appeal means Jepngetich will miss the semifinals, significantly impacting the team's medal prospects.