England and Manchester City defender Alex Greenwood was stretchered off in the club's Women's Champions League win over St. Pölten on Thursday.
City earned a 2-0 win after second-half goals from Lily Murphy and Kerstin Casparij. However, Greenwood's injury put a sour note on an otherwise successful evening.
Greenwood appeared to have suffered a knee injury following a tackle with Melanie Brunnthaler and received lengthy medical attention.
City have already lost stars Vivianne Miedema and Lauren Hempto knee injuries this season.