Pauline Ferrand-Prevot (Canyon-SRAM) is scheduled to undergo surgery again to treat iliac artery endomysial fibrosis, which kept her out of competition for four months a year ago.

The French road, cyclocross, and two-time mountain bike world champion returned to competition last summer, winning his first UCI Mountain Bike World Cup cross-country race in Val di Sole in August. She then took the world title at the UCI Mountain Bike World Championships in Mont-Sainte-Anne, Canada, at the end of August.

She returned to cyclocross after missing last season but has struggled to find the kind of power that led her to the world title in Tabor in 2015.

"For the past 15 days I have been experiencing unusual symptoms in my left leg while cyclocrossing," she wrote on her Facebook page. She consulted a doctor and got an immediate answer.

"Yesterday I was diagnosed with a recurrence of iliac artery endomysial fibrosis (same side, over previous surgery)."

"This lesion is milder than the previous one, but it needs surgery. That is why I am having surgery on Friday."

Ferrand-Prevot broke his nose in a crash while competing in the Tokyo Olympic test event in October and had to undergo surgery.