Neil Taylor has been stretchered off clutching an oxygen mask after 20 minutes of Swansea City's game against Sunderland.
The 23-year-old was down for around four minutes when he sustained what looks like a severe knee injury in a challenge with Craig Gardner.
The left-back was replaced by Ben Davies and it now appears that he will face a long period on the sidelines.
It has since been confirmed that Taylor suffered a fractured ankle.