What is the full name for the team that won the 1990/1991 Eredivisie football championship?
1990–91 Eredivisie The Dutch Eredivisie in the 1990/1991 season was contested by 18 teams. PSV won the championship.
Amsterdam Tournament The Amsterdam Tournament (Dutch: "Amsterdam Toernooi" ) was a pre-season association football competition, held in Amsterdam, Netherlands. The competition was hosted by Eredivisie club Ajax at the Amsterdam Arena. It was inaugurated in 1975 as the Amsterdam 700 Tournament to celebrate 700 years of history in the city. It was held annually each summer until 1992, when the last edition of the original tournament was played. It returned in 1999 with the backing of the International Event Partnership (IEP). Four teams participate in the competition, played in a league format since 1986.