Oh no! Dancing With the Stars pro Lindsay Arnold badly injured her knee during show rehearsals earlier this week and now, fans are concerned the 23-year-old won’t be able to perform with partner Jordan Fisher on tonight’s new episode. “Lindsay injured her knee during camera blocking rehearsal Sunday morning while working on a number with the troupe,” a DWTS source revealed to People.

“Lindsay is hopeful she’ll be cleared to dance tomorrow but it will likely be touch and go until showtime Monday,” the insider continued, adding that fellow pro Sharna Burgess — who was voted off in Week 3 with partner Derek Fisher — is learning Lindsay’s routines for the Monday, Nov. 13 show in case she can’t return to the ballroom. Lindsay later confirmed her injury and gave fans an update on her condition.

“I was practicing the pro number and I literally just stepped up onto a stair and it felt like my whole leg gave out and stopped working and I thought it was just a one-time thing and then it happened a couple more times, just doing simple things. It’s frustrating because it’s the semi-finals and I want to dance it with Jordan, and I just hope this doesn’t stop me from doing that,” she told People.

With just five duos left competing on Season 25, Lindsay is the only pro in the running who has yet to win the reality show’s coveted Mirror Ball Trophy. Emma Slater (who is now paired with Property Brothers star Drew Scott) previously won Season 24 with partner Rashad Jennings and Witney Carson(dancing with actor Frankie Muniz) won Season 19 with Alfonso Ribeiro. Veteran pros Mark Ballas (currently paired with violinist Lindsey Stirling) and Val Chmerkovskiy (now dancing with Olympian Victoria Arlen) have both won twice in the past. Mark with Kristi Yamaguchi in Season 6 and Shawn Johnson in Season 8 and Val with Rumer Willis in Season 20 and Laurie Hernandez in Season 23. We hope Lindsey is able to return to the ballroom tonight — stay tuned!