:1991 ABN AMRO World Tennis Tournament

{{TennisEventInfo|1991|ABN AMRO World Tennis Tournament|

| date=25 February – 3 March

| edition=19th

| category=ATP World Series

| prize_money=$450,000

| draw=32S / 16D

| surface=Carpet / indoor

| location=Rotterdam, Netherlands

| venue=Rotterdam Ahoy

| champs={{flagicon|ITA}} Omar Camporese{{cite web|title=1991 Rotterdam – Singles draw|url=http://www.atpworldtour.com/en/scores/archive/rotterdam/407/1991/draws?matchType=singles|publisher=Association of Tennis Professionals (ATP)}}

| champd={{flagicon|USA}} Patrick Galbraith / {{flagicon|SWE}} Anders Järryd{{cite web|title=1991 Rotterdam – Doubles draw|url=http://www.atpworldtour.com/en/scores/archive/rotterdam/407/1991/draws?matchType=doubles|publisher=Association of Tennis Professionals (ATP)}}

}}

The 1991 ABN AMRO World Tennis Tournament was a men's tennis tournament played on indoor carpet courts. It was the 19th edition of the event known that year as the ABN AMRO World Tennis Tournament, and was part of the ATP World Series of the 1991 ATP Tour. It took place at the Rotterdam Ahoy indoor sporting arena in Rotterdam, Netherlands, from 25 February through 3 March 1991. Unseeded Omar Camporese won the singles title.{{cite book|title=The International Tennis Federation World of Tennis 1992|year=1992|publisher=CollinsWillow|location=London|isbn=9780002184304|pages=118, 135|editor=John Barrett}}

The singles line up was headlined by Association of Tennis Professionals (ATP) No. 3, Australian Open runner-up, Philadelphia and Memphis winner Ivan Lendl, reigning Rome champion, ATP Comeback Player of the Year Thomas Muster, and Estoril titlist Emilio Sánchez. Also present were Wimbledon semifinalist Goran Ivanišević, Monte Carlo and Tel Aviv winner Andrei Chesnokov, Jonas Svensson, Jakob Hlasek and Karel Nováček.