The youngster's signing ceremony was held yesterday and he told a packed media conference: "I am happy and proud to have joined a club as big as Valencia.
Maduro also revealed: "Before I signed for Ajax, I actually had an offer from Valencia when I was 15 or 16 years old. They wanted me to join their youth team, but I decided against it because I was too young to play abroad."
The young midfielder was also asked about replacing fans' favourite David Albelda and confidently replied: "Albelda is a good player, but no one player is as important as the team. Only a team can win games."