Brighton boss Roberto de Zerbi has confirmed they've lost fullback Pervis Estupinan to injury.
Estupinan faces a month out after breaking down in defeat at Aston Villa last week.
"He's injured and can't play for a long time," said De Zerbi ahead of Thursday's Europa League tie in Marseille.
"One month, more or less. I don't know the right time but it's a muscular injury and it is not for a game or two.
"Unfortunately, it is an important player we are losing but we can play in that position with Tariq Lamptey, Igor Julio or others. We have to be ready with others."