Ronald Koeman (Dutch pronunciation: (listen); born 21 March 1963) is a Dutch retired footballer who has been manager of the Netherlands national team since 2018. He is the younger brother of his former international teammate Erwin Koeman and the son of former Dutch international Martin Koeman. A composed player on the ball, Koeman was capable of being deployed both as a defender and as a midfielder, and he frequently played as a sweeper, due to his vision and his ability on the ball. Regarded as one of the best and most prolific attacking central defenders of all time, Koeman was renowned for his long-range passing, as well as his shooting accuracy and power from distance, especially on free kicks, and is the top scoring defender in world football; he was also an accurate penalty kick taker.
At international level, Koeman was one of the stars of the Netherlands national team, alongside Marco van Basten, Ruud Gullit, Frank Rijkaard and Dennis Bergkamp. During his career with the Netherlands, Koeman won UEFA Euro 1988 and played at the 1990 and 1994 FIFA World Cups, captaining the team at the latter.