The 1981 ABN World Tennis Tournament was a tennis tournament played on indoor carpet courts at Rotterdam Ahoy in the Netherlands. It was a WCT tournament that was part of the 1981 Volvo Grand Prix circuit. It was the ninth edition of the tournament and was held from 16 March through 22 March 1981. First-seeded Jimmy Connors won the singles title, his second after 1978.
See main article: 1981 ABN World Tennis Tournament – Singles. 
Jimmy Connors defeated Gene Mayer 6–1, 2–6, 6–2
Fritz Buehning / Ferdi Taygan defeated Gene Mayer / Sandy Mayer 7–6, 1–6, 6–4