| Date: | 26 February – 4 March |
| Edition: | 18th |
| Category: | ATP World Series |
| Draw: | 32S / 16D |
| Prize Money: | $450,000 |
| Surface: | Carpet / indoor |
| Location: | Rotterdam, Netherlands |
| Venue: | Rotterdam Ahoy |
| Champs: |  Brad Gilbert[1] |
| Champd: |  Leonardo Lavalle / Jorge Lozano[2] |
The 1990 ABN World Tennis Tournament (known as such in 1990 for sponsorship reasons) was a men's tennis tournament played on indoor carpet courts. It was the 18th edition of the event known that year as the ABN World Tennis Tournament, and part of the ATP World Series of the 1990 ATP Tour. It took place at the Rotterdam Ahoy arena in Rotterdam, Netherlands, from 26 February through 4 March 1990. First-seeded Brad Gilbert won the singles title.[3]
See main article: 1990 ABN World Tennis Tournament – Singles. Brad Gilbert defeated 
Jonas Svensson 6–1, 6–3
See main article: 1990 ABN World Tennis Tournament – Doubles. Leonardo Lavalle / Jorge Lozano defeated 
Diego Nargiso / 
Nicolas Pereira 6–3, 7–6