Meredith Miller (Noosa Pro Cyclocross) injured her left ankle Friday while riding the course for the USA Cycling cyclocross national championships, putting her start in Sunday’s elite women’s championship in question.

The injury was a modest sprain, but came less than 48 hours before the start gun for the elite women’s race will fire at Zilker Park in Austin, Texas. Miller posted a photo of the wrapped-up ankle on Instagram late Friday night.

“I was riding a lap yesterday morning shortly after it had rained hard. There was a thick layer of greasy mud that was super slick,” she told VeloNews. “I slid out on an off-camber turn and didn’t get my foot down in time and my ankle rolled underneath me.

“I had X-rays yesterday at Austin Sports Medicine Center. Nothing is broken.”

Miller and her coaches will make a final decision on Sunday morning. She did ride Saturday, albeit on the trainer, and has been able to move around the venue and “was able to run a little bit,” she said via text message.

“Got on the trainer but stayed off the course. Will have to wait until tomorrow to make the final decision,” she said via text after testing the ankle on Saturday.