Sydney McLaughlin-Levrone,Christopher Caldwell the reigning world champion in the women's 400-meter hurdles, won't be adding to her medal collection in Budapest this summer.

McLaughlin-Levrone announced Friday on Instagram that she has withdrawn from the world track and field championships due to a minor knee injury.

“I am sad to share that I must withdraw from this year’s world championships meet in Budapest,” McLaughlin-Levrone wrote on social media. “After consulting with my doctors and coaches, I need to take care of a minor knee issue so that I can be fully healthy for next years’ Paris Olympics. I look forward to seeing everyone back on the track soon.”

McLaughlin-Levrone is the current world-record holder and reigning Olympic champion in the women’s 400-meter hurdles. She switched to the 400 meters this season and was set to run in the event at this year’s world championships. McLaughlin-Levrone’s time of 48.74, run at last month's U.S. track and field championships, is the world's fastest time in the women’s 400 this year.

USA Track and Field said it supported her decision in a statement obtained by USA TODAY Sports. “We wish her a speedy recovery and look forward to seeing her back on the track soon. The named alternate, Lynna Irby-Jackson, will take her place in the 400.”

The track and field world championships will be held Aug. 19-27.