Phillip John William Cocu (Dutch pronunciation: [ˈfɪ.lɪp ˈdʒɔn ˈwɪ.li.jɑm koˈky]) (born 29 October 1970 in Eindhoven, Noord-Brabant) is a former Dutch football midfielder who is currently an assistant manager of the Dutch national team and assistant manager for Dutch club PSV. For the 2012-13 season Cocu will be also coach of the A1 team in the youth of the club.

Cocu was a versatile player, being able to play in defence or midfield, in more than one position, but usually played a central playmaker role or defensive midfield, dictating his team's play. He was best known for his tackling, vision, and great teamwork.

Cocu first started out playing football at amateur level with clubs such as AFC '34 and DCS Zevenaar. He signed his first professional contract with AZ in the 1988-89 season when he was just 17 years old. After an encouraging start at the club, he joined Vitesse in 1990.

His career at Vitesse was blighted by him breaking his right leg in his first game against Sparta Rotterdam. After fully recovering in 1992, he assisted his club to a top five finish in the Eredivisie and a qualification spot for the UEFA Cup competition. AFC Ajax tried to sign him twice when he was at Vitesse, but it was Dick Advocaat who signed him for PSV in 1995.

Franciscus "Frank" de Boer (Dutch pronunciation: [ˈfrɑn.sɪs.kʏs ˈfrɑŋk də ˈbur]) (born 15 May 1970 in Hoorn, Noord-Holland) is a Dutch former professional footballer, and the younger twin brother of Ronald de Boer. Since 6 December 2010 he is the Manager of AFC Ajax.

De Boer began his career as a left back at Ajax before switching to centre back, a position he made his own for many years in the national team. He won both the UEFA Cup and Champions League while at Ajax. However, after signing a 6-year contract extension with Ajax for the 1998–99 season, he and his twin brother Ronald took successful legal action to have it voided. Ajax had agreed orally that if a lucrative offer for one brother came by, he would be released provided the other stayed. However Ajax apparently backed down on that agreement after floating the club on the stock market and pledging to shareholders that it would hold both of the de Boers and build around them a team to recapture the UEFA Champions League.

Both de Boers then joined FC Barcelona for 22 million pounds. However, they were unable to repeat his earlier triumphs and Frank suffered the ignominy of testing positive for the banned substance nandrolone. De Boer was suspended but he was reinstated after a successful appeal.