Barcelona midfielder Frenkie de Jong has said he is "really excited" for his first El Clasico ahead of Wednesday's clash against Real Madrid.
De Jong, 22, played a key role for Ajax last season as they dismantled Real in the last 16 of the UEFA Champions League.
The Dutch side subsequently reached the semi-finals of Europe's top-tier competition, and they won a league and cup double in the Netherlands in one of their best campaigns of the 21st century.
In the summer, though, Ajax lost a number of their key players, including De Jong, who signed for Barca for £65 million.