Brighton were dealt an early setback against Liverpool at Anfield on Sunday evening as Ferdi Kadioglu was forced off after a challenge with Ryan Gravenberch.
The Brighton full-back left the pitch in the sixth minute, with Costinha coming on as his replacement in the eighth round of the Premier League.
Liverpool then moved quickly to establish control. Florian Wirtz opened the scoring in the 17th minute before Alexander Isak added a second four minutes later.
Brighton had made an impressive start to the season before the match, collecting 16 points from their opening seven games to sit third in the Premier League table. Liverpool began the game in fifth place with 13 points.
Brighton had also scored more goals than any other side in the Premier League this season, with their players having found the net 23 times.
