Editor's note: Louis van Gaal has retired from soccer management at the age of 67, nearly three years after he left Manchester United.

Louis Van Gaal (Ajax manager) with the trophy after winning the European Cup by defeating AC Milan during 1994-1995 season. [Photo/IC]

Barcelona's Dutch coach Louis Van Gaal (left), as he displays the League trophy with team captain Pep Guardiola to fans from the balcony of the Barcelona City Hall, Spain, May 24, 1999. [Photo/IC]

Goalkeeper Joerg Butt (L) and player Franck Ribery congratulate FC Beyern Munich's coach Louis van Gaal on his 59th birthday, Aug 8, 2010. [Photo/IC]

From left to right, Munich's Mark van Bommel, Louis van Gaal and Arjen Robben pose with the trophy after becoming the new Bundesliga champion after the German first division Bundesliga soccer match between Hertha BSC Berlin and Bayern Munich in Berlin, Germany, May 8, 2010. [Photo/IC]

Forward Robin van Persie (9) of the Netherlands celebrates with coach Van Gaal Louis after scoring the equalizer during the first half of the World Cup Group B match against Spain at Arena Fonte Nova in Salvador, Brazil, June 13, 2014. [Photo/IC]

Former Ajax Amsterdam coach Louis van Gaal (L) and his wife Truus show the UEFA Europa League trophy before the UEFA Europa League semi final, first leg soccer match between Ajax Amsterdam and Olympique Lyon, in Amsterdam, the Netherlands, May 3, 2017. [Photo/IC]

Manchester United's Louis Van Gaal waves goodbye to the fans during the Emirates FA Cup Final match at Wembley Stadium in London, UK, May 21, 2016. [Photo/IC]