The 1990 ATP Tour World Championships, also known as the 1990 IBM ATP Tour World Championships for sponsorship reasons,[4] was a men's
tennis tournament played on indoor
hard courts in
Frankfurt, Germany. It was the 21st edition of the
tournament and was held between 13–18 November 1990.
Andre Agassi won the singles title.[5]
^Collins, Bud (October 2010). "Year-End Championships". The Bud Collins History of Tennis: An Authoritative Encyclopedia and Record Book. New York: New Chapter Press. p. 746.
ISBN978-0-942257-70-0.