Adrianus Cornelis „Adrie“ Koster (Dutch pronunciation: [ˌɑdrij.ˈaːn.ʏs kɔr.ˈne.ˌlɪs ˈɑd.ri ˈkɔs.tər]) (born 18 November 1954 in Zierikzee, Zeeland) is a former football winger from the Netherlands, who was last in charge of coaching Club Brugge.

He played for Roda JC (1977–1979) and PSV Eindhoven (1979–1983). He played his last match in the Eredivisie on 2 October 1982, replacing Jurrie Koolhof. In the follow season 1983/1984 retired from his professional football career.

Koster obtained three caps (no goals) for the Netherlands national football team in 1978.

Koster later became a football manager, and started to work as an assistant for FC Eindhoven (1985–1986).

Since then he worked for Willem II Tilburg (1986–1991), Roda JC (1991–1993), Helmond Sport (1993–1995), TOP Oss (1995–1997), Excelsior Rotterdam (1997–2003), VVV-Venlo (2004–2005), and RKC Waalwijk (2005–2006). At the last club he was fired due to poor performances on 27 November 2006.

He became head of the youth academy of AFC Ajax, and was appointed manager of the club's main squad on 9 October 2007, when Henk ten Cate went to Chelsea.

Johannes ("Johan") Boskamp (born October 21, 1948 in Rotterdam) is a Dutch football manager, his most recent job was in Belgium managing KSK Beveren, but he was dismissed in late December 2009

His former clubs as a player include RVV HOV, Feyenoord Rotterdam, Holland Sport, R.W.D. Molenbeek (with whom he won the Jupiler League in 1975), and Lierse S.K.. Boskamp was furthermore voted Belgian Golden Shoe winner in 1975. He was part of the Dutch team for the 1978 FIFA World Cup, making one substitute appearance against Scotland.

Later Boskamp became a manager and coached Belgian clubs Lierse S.K., Verbroedering Denderhoutem, K.S.K. Beveren, K.V. Kortrijk, R.S.C. Anderlecht, K.A.A. Gent, and K.R.C. Genk, Georgian side FC Dinamo Tbilisi and also the Georgia national football team. After coaching Al Wasl FC of UAE and Kazma Sporting Club of Kuwait in the Middle East, he became manager of English side Stoke City for the 2005–06 season. He was then briefly manager at Standard Liège in 2006.

In November 2007 he became coach of another Belgian club: FCV Dender EH, on 19 May 2009 the has quit Dender after an argument with his coaching assistant Patrick Asselman, who has been named new coach.

Maarten Stekelenburg (Dutch pronunciation: [ˈmaːrtə(n) ˈsteːkələ(n)ˌbʏrx]; born 22 September 1982 in Haarlem) is a professional Dutch football goalkeeper who plays for Serie A club Roma and also the Netherlands national football team.

Stekelenburg is product of the Ajax youth system, where he followed in the footsteps of Edwin van der Sar, who he succeeded in the Dutch national team, with whom he reached the final of the 2010 FIFA World Cup.

Stekelenburg began his career at Zandvoort '75 before joining VV Schoten, which he left for Ajax when he was 15 years old. He made his official debut for Ajax on 24 February 2002, in a game against NAC Breda. At the start of the 2002–03 season he won his first prize when Ajax won the Johan Cruijff-schaal. In 2004 he and Ajax won the Eredivisie championship, having played 10 matches that season.

He became the first goalkeeper at Ajax in the 2005–06 season. In 2006 he won his first KNVB Cup. At the start of the 2006–07 season he won his second Johan Cruijff-schaal, which he helped his team defend the next season, and later on in 2006–07, he won his second KNVB Cup.

Urby Vitorrio Diego Emanuelson (born 16 June 1986 in Amsterdam) is a Dutch professional footballer of Surinamese descent, who plays for Serie A club Milan and for the Dutch National Team. He plays as either a left midfielder or left back. He spent most of his career at Ajax playing as a left back, before being played more as a left midfielder by manager Martin Jol, but used by Massimiliano Allegri as an attacking midfielder. Despite playing as a defender, he is best known for attacking attributes such as pace and dribbling.

Emanuelson is a product of Ajax's youth system, joining them from Voorland SC. He made his debut during the 2004–05 season on April 10, 2005 in a 4–2 home win over AZ. As of the 2005–06 season he became first-choice left back and he won his first career trophies, starting with the 2005 Johan Cruijff-schaal and the 2006 KNVB Cup. As a result for his efforts he was named "Amsterdam talent of the year 2006". Both the Johan Cruijff-schaal and the KNVB Cup were successfully defended in the 2006–07 season and the Johan Cruijff-schaal was won for the third consecutive time at the start of the 2007–08 season.