A left-footed midfielder with a powerful shot and great stamina, Lerby was a player who was always committed and a leader of the team. He once played two competitive matches in two countries on a single day on 13 November 1985: first in the afternoon a World Cup qualifier with Denmark against the Republic of Ireland in Dublin, being substituted having helped to secure a solid lead, and later in the evening a DFB-Pokal match with Bayern Munich against VfL Bochum, entering as a half-time replacement.[1] Denmark qualified for the 1986 FIFA World Cup, and Bayern went on to lift the cup.[2]
Lerby always played with his "socks down" – short socks or long socks rolled down but always without shin pads. This was quite uncommon and would be against the rules today.
They switched to the Dutch club Ajax Amsterdam, when Lerby was only 17 years old. Lerby's first home game was a 4–1 against Go Ahead Eagles on 11 April 1976. He won three Dutch Eredivisie league titles in his first six years at Ajax, in the 1976–77, 1978–79, and 1979–80 seasons. In the summer of 1981 he was named team captain, succeeding newly departed Frank Arnesen. In the two seasons Lerby was captain, Ajax won a further two Dutch championships with high goal differences.
He moved to Germany in 1983, replacing midfielder Paul Breitner at Bayern Munich. He remained there for three years, winning two German Bundesliga championships and two DFB-Pokal cup trophies. His career continued for French team AS Monaco from 1986 to 1987.
Lerby moved back to the Netherlands in 1987 and was reunited with Frank Arnesen at Ajax' rivals PSV Eindhoven. He was a part of the 1988 European Cup winning PSV squad, also including fellow Danes Jan Heintze and Ivan Nielsen, though Frank Arnesen missed the final against S.L. Benfica because of injury. Lerby ended his active career in 1990.
While at Ajax, he made his senior Danish national team debut against the Republic of Ireland in May 1978, scoring one goal in the 3–3 draw. Lerby was selected for the Danish national team at the 1984 European Championship, where he played in all four of Denmark's matches, and scored a goal in the semi-final against Spain, which saw Denmark eliminated on penalty shoot-out. At the 1986 FIFA World Cup he played in Denmark's four games, scoring in Denmark's 6–1 win against Uruguay. He was a part of the Danish squad for the 1988 European Championship.
Non-playing career
Between 9 October 1991 and 11 March 1992, he spent some time as coach with Bayern Munich, as successor of Jupp Heynckes. With a spell of undistinguished results, including a combined 6–3 UEFA Cup elimination by his former club B 1903, Lerby effectively ended his managerial career and became a FIFA-licensed sports agent (Essel Sports Managements).
Personal life
Lerby was married to Dutch singer and actress Willeke Alberti from 1981 to 1996. He was later married for a second time, with Arlette van der Meulen. He now lives in Laren, Netherlands. His son Christian Lerby, born in 2001, is a Dutch tennis player.[3]