FA Cup holders Arsenal are out, but four other Premier League sides booked their places in the fifth round.
Lamptey, 20, has been linked with Bayern Munich, Atletico Madrid, and Arsenal, while Karbownik made his first three Poland appearances in October.
This was not the way many thought would go, as the Seagulls eased to a comfortable away win at Elland Road.
In the latest transfer news Ben White to Liverpool and Boulaye Dia to West Ham have been mentioned.
Brighton are slowly drifting closer to the relegation zone, and Leeds have feasted on bottom-half sides.
This ended in a narrow win for the hosts as they continue to surge towards the top of the Premier League table and are now in third place.
This will be a pleasing game on the eye on Wednesday as Pep Guardiola and Graham Potter love their teams to dictate the tempo of the game.
With as many as 15 Premier League sides competing in the fourth round, who’ll face who in the next round?
Manchester United and Manchester City are rolling, and the latter’s cup shutout of the former this week was its 14th clean sheet over 23 matches. Wow.