Brighton manager Graham Potter has confirmed Enock Mwepu will miss the rest of this season.
Mwepu went off injured during last Saturday's 3-0 win at Wolves.
The Zambia midfielder has impressed in recent weeks with goals against Liverpool and Arsenal.
Potter told The Argus: "He has a slight injury in his groin which probably means that will be him for the rest of the season."
The Seagulls take on Manchester United at the AMEX on Saturday.